First thing to do is make a complaint to the health service asking for an explanation. You will find a patient feedback form on their website. If you have a copy of the report scan it and attach it. If you don't have a copy, demand one now. By law they must respond to all complaints. Unfortunately, 'respond' is a bit like 'consult' there are huge possible variations in both action and intention.
Surgeons are adept at robbing off concerns, admitting any liability is a huge professional risk and they will not do it willingly. The health service also has a lot to lose and will not co-operate. ( @allyjay can tell youy how that pans out) Can you sue? Meh, probably not unless you can prove you have been severely compromised. It will take years and truck loads of parasitic lawyers.
I think the best you can do for now is to officially document the problem and hope that if a mistake was made it doesnt affect your overall outcomes. You can also hope someone gets a kick up the arse, but you will never know about that. Sorry this has happened to you, it is too common and very distressing.