Could you not get this into the media? It's outrageous - so for all they know, they have paedophiles working there, or staff with bogus qualifications - and let's face it, it would'nt be the first time.
Could you raise it with your MP? (If he/she is as useless as mine then I guess not) This MUST get out into the public and political domain. I would send a synopsis to every health correspondent out there, plus some of the daily rags that like a scandal.
In my experience, when you complain to the practice, they try to throw you off the register; when you complain to hospitals they just don't respond (been waiting a year for a response); when you complain to the GMC, they close ranks with doctors (in fact, there are allegations of serious corruption there, came upon something several years ago which implicated the gmc in allowing convicted paedo doctors to keep practising); when you complain to the Ombudsman, they side with the medical establishment and come up with daft responses like that if i had stayed at the practice which failed to diagnose 2 diseases and failed to spot i needed urgent suregry, they "may eventually " have diagnosed the diseases.
As I have said before, there is NO accountability - and that's why they keep getting away with it. Like the banking sector, the medical sector is untouchable and they know it.