Yes I have done all of the above, nothing has worked.
I have also spoken to customer service many times, and I have spoken to the fault management team once. No-one has been able to sort it, so I will call again tomorrow, however it is very frustrating that I have to start from scratch every time, it takes over an hour to get through to the fault management team.
Is there anyway I can fast-track a call to the fault management team?