Well its a £300 lesson learned, you could make a complaint and ask for a refund as it hasn't met your expectations. Get the standard map put back on.
Sales of Goods and Services Act and (if you paid by credit card) Consumer Credit Act.
Remapping is a murky area with questionable results easy to get carried away with placebo effect.
If you're not happy talk to them.
I still have the issue with if I am right or not though. I am a fair person and what I am saying is I am not convinced there has been any improvement. I certainly do not think there has been. Is it quicker ? No, is it smoother ? No Does it ride better in any way , No. It would seem I am in the minority as I had it remapped following other bikermates experiences who maintain it's the dogs bollacks, me though I just don't see it has had any benefit. My bike is the Euro 4 and maybe runs better than the previous models so could be the reason why?