Well my short nightmare is over,I spoke to another CS agent who said nothing had been done since I had last spoken to someone.
He then said I had to "chat" to a safer gambling agent as they are only available by chat not on the phone.He also explained the security problem was not necessarily my new email just that changing it triggered a review of my details.
I did explain I don't have 2 accounts and that they have a major IT issue but that went in one ear and out the other.
Anyway after chatting to safer gambling again it turns out my "account was closed in error"
Good luck Dai I hope this helps you.
I'm off to have a stiff drink or two.