Mate, this doctor probably ain't even capable of producing a successful transplant, go back to him, are you NUTS?
All that would happen is you'll lose precious grafts from your donor area and have another transplant that doesn't work.
By all means chase a refund, but don't go back.
I'm sure some research on this clinic online would have helped before you rushed in.
There is no firm proof online that this guy is not a butcher, all slick promotion and no substance, no patient blogs, dodgy photographs, and too many 1 post wonders who pop up on forums and give a glowing review of the clinic.
This link is an example
http://www.besthairlossforum.com/heads-up-to-vinci-clinic-malaga-t79.html
Headofhairagain, Kramer, and a few other fake accounts at work on that thread, and the picture they posted of that's guys hair transplant result was awful, poor result, and the sure sign of an amatuer is that the grafts were put in at the wrong angle, total joke, and the fake accounts all posted about what a great result it was.
Put this down as a learning experience, and don't make the same mistake twice....only Doctor in UK that's worth anything is Farjo, best docs are hasson wong, Rahal, Shipiro (smg clinic) Feller, ferrundi in brussels plus others, but you HAVE to do your research to avoid these scammers.