Professional Photo Editing

The local Snappy Snaps shop offers it, and so do many others. I'd imagine almost any professional photographer (eg weddings) in your area can do it.

First two from Google:
http://londonproretouch.com/prices/
http://www.snappysnaps.co.uk/services/enhancement/retouching.php

Or if you are asking what software they use, almost certainly Adobe Photoshop and Lightroom.

You could try a subreddit on Reddit.
People do some amazing things on there with photos

You may have to gift someone

Ok cheers.

I wouldn't mind a go with photoshop but the cheapest deal i can find is £8.57 per month. Minimum 12 months(i think). Seems a waste for one photo.

I have tried to use MS Paint but is a waste of time due to its limits.

www.fiverr.com

http://start.fivesquid.com/?gclid=CKT82Mi0g8oCFUG4GwodJXgNRg

https://www.fivesquid.com/39862/Photoshop-anything-you-want

The free equivalent of Photoshop is called gimp (same functions, different user interface) but unless you are a highly trained technonerd, it might be easier to shell out the ackers.

You can download gimp from https://www.gimp.org/

And there are plenty of how-to's on youtube for GIMP....like this https://www.youtube.com/watch?v=q7EAvaHwGDg