Without seeing them, it's hard to know if you are totally justified or being very fussy, but..
Unless you have agreed otherwise, in the UK the photographer has the copyright. "Obviously" you will have had permission to use them in your marketing, but if you want to make material differences, it would be a good idea to ask if that's OK with them.
If they are fine (and think your edits improve them) then it shouldn't be too hard to get them to use your version.
If you do have the copyright, you can just say 'use these or nothing'.
Personally, unless you are selling makeup, "perfect" photos are a two-edged sword. Can you live up to perfection in person?