I had a client I had seen before message me at the start of the feb asking for a booking. I told him then to contact me in the last week of the month to talk about the next month.
I tell everyone this as it prevents me from being booked up months in advance and because I don't know what I'm doing too far in advance.
As of monday the small amount of availability i had was booked up. I took down my avaiblitly/blocked out my calendar  So today! The aforementioned client emails me and ask for a booking. My auto reply replies and says that I am fully booked and I am so sorry.

He then says "Seems there is little point in making contact again as I am not a "chosen one "

I was like  so I message him and explain I found that a little unnecessary because I had explained I only see a very small amount of people now and there's not much I can do if other people email before him as I did tell him to contact me in the last week of the month.

he then says
"You clearly said to make contact near to March which I duly did ......
SOME WAFFLE IN
It's business after all. You exhange your body for money and both parties can decline"

It's not march and I checked my emails as I DELETE NOTHING! and there was my explanation of when to contact me  plain as day.
Now i'm so angry because he felt the need to bring up "you exchange your body for money" Just because he felt slighted that I didn't have any availability this month! I'm not bothered by it because it's true! but why did he need to add it to his email ?
My earlier emails stated nothing that could have lead to that remark and he's really just trying to insult me because he feels annoyed that I didn't give him special treatment and wait until he decided to book me. Like are you kidding me?
He's someone i've seen before  a few times! so it smarts because he seemed like such a nice guy and he's old enough to be my great grandfather so I mistakenly thought he was mature!

Am i overreacting because I really feel like he specifically said that to point out that I was just a lowly prostitute as it was a really unnecessary sentence. It had nothing to do with what we were discussing.

I always make it clear that when someone contacts me at a later date, any booking is subject to my availability. He's angry and feeling rejected.

Thank you guys! You are all absolutely right.

It was honestly so baffling and just serves as reminder to me that I need to stop taking everyone at face value.
They're only nice till they can't get what they want, then I'm just a lowly prossie whore 

Like it seems silly considering my counter to the argument could have been but "you are somebody who has to pay girls to sleep with you. If I had to choose between being paid for sex and paying people for sex I think I know which one I would pick" but I'm not honestly of that opinion. If you buy/sell sex I don't judge or care and would never use that opinion as an insult because I felt slighted.  men 

Yes he is bitter but when these guys feel rejected etc, the truth about what they really think of escorts comes out doesn't it.

Take all their niceness with a pinch of salt (because it can turn just like that) and keep taking the money x

Good lord, I can see why you were upset.  What he said was as rude as it was idiotic.

I would have felt inclined to respond "You exchange your money for pleasure and I am opting to decline giving you any pleasure so F off."

Hugs to you, hon.  We don't need idiots like this in our lives.

I have had an old guy like this behave this way after being really nice. These guys are obviously incredibly insecure and cannot copy  with the fact they are old now. You are well rid of him as he has shown his true colours now!  Just ignore and   think of him as a nutter.

I am the only one who sees why the client is quite peeved???

Imagine if you wanted to make an appointment to a hairdresser for example who you decide you like and have started using regularly. You ring them up for an appointment they tell you to ring back in a week or two, so you do now they tell you they are full, would you not be pissed and tell them your taking your money else where? I would.

I am also baffled what his age has to do with it.

I am the only one who sees why the client is quite peeved???

Imagine if you wanted to make an appointment to a hairdresser for example who you decide you like and have started using regularly. You ring them up for an appointment they tell you to ring back in a week or two, so you do now they tell you they are full, would you not be pissed and tell them your taking your money else where? I would.

I am also baffled what his age has to do with it.

You  Do have a point. I think he left it very late though at the end of the month. Maybe it would have been better to pencil him in before you knew your availability and just let him know if you weren't able to do that day.