Well here is what I hope is the the closing update. Service is back OTA as of late last Sunday evening. It’s been operating consistently at 30mbiit/s since then. According to O2 this was an ‘account’ error, ultimately resolved by ‘removing’ the account from the network and reactivating 24 hours later. Makes no sense to me, even less so why it took so long, but however it was archived, my thanks to O2 for restoring the service, even if it did take 16 weeks. I guess the lesson learnt is to persist and stay polite.
Btw, in the interim, the ombudsman service found in favor of o2 and did not uphold my complaint; ironic eh ?
Well done; if only they would perform this miracle on all their equipment when they screw it up.