I'm booked up for the next fortnight, more or less; London is a bit bonkers at the moment and my advanced booking special seems to be making my clients happy (just jinxed myself though, I expect!). This may sound like mad advice but because advertising is so important no matter where you are, might it be worth borrowing a very small amount of money for the short-term? Something like ?100? I spent ?90 for 3 months advertising on London-Independents.com and found it very worthwhile. You could spend it on whichever sites work best for you (Adultwork, Punternet, etc). And the remaining ?10+ could go towards a YourEscortSite.com site if you are really honestly in need - I'm sure we could work something out.
On the other hand, my grasp of global economics is murky at best but it would seem particularly true at the moment that risky borrowing is not always a very good idea, so disregard this post if it sounds like a silly idea. I just can't see how a business could improve without any advertising... hmm. Perhaps applying to a parlour or agency would be something to consider?