Ok... Just spoke with Angie at EDF, She says they're quite within their rights to backdate the billing from when I moved in four years ago as they have been billing the address (although not me! They also only have my say-so as to when I moved in here so thats neither here nor there!) and she also said they're volunteers of the fair trade act so have no obligations to help me or this situation!
I reminded her there is no outstanding bill in my name at this address and if they want to be funny I'll move out and they'll get nothing...
Going by my daily readings we've calculated an average usage of 22 units per day. (Is that high???...) They said if I agree to that they'll backdate it and arrange a 'goodwill payment towards the overall bill' and I need to sign something etc etc. I've told her to put it in writing and show the the amount they're proposing (as advised-thanks guys) and I'll look into the laws surrounding this and get back to her when I have a conclusion.
I will call the ombudsman when I receive the overall bill. Expecting it to be £1500 or more
Still bemused as to why they waited 4 years before trying to find out why the bill has not been paid... This could've been dealt with so much sooner.
Not sure whats happening with the gas account now, didnt give me time to discuss it again.
I'll Keep you updated. :0)