It could just be that you happen to have had an unusal confluence of circumstances/events, but if it were me I think I would want a second opinion. It may take some persuading to get a referral outside of the area on the NHS, but it should be possible, especially if you are in an area without a specialist centre or teaching hospital. If you can manage the cost of a one off initial consultation with a different consultant, it may be worth the fee - make sure your GP sends copies of all the correspondence from the hospital you've been to. BUPA will give you a list of their approved consultants, which may help, they may even be able to find out who does a lot of redos for you.
If you've got any friends or colleagues with private medical insurance, they may also have ideas for where to go or who to see 'over the border'. But best way is to suss out who is Top Dog at the nearest big teaching hospital and contact their secretary for advice on their private practice and their waiting time for NHS referral.
Hope that helps,
New stuff: GERD, Recurrent cystitis/Overactive bladder
Lifelong stuff: Food allergies/intolerance, eczema, asthma