edf energy review: Discgraceful behaviour

I recently received a threatening letter from EDF energy, saying they had made numerous attempts to contact me regarding an unpaid bill and that if this amount was not paid within a few days they would be taking court action against me and send an EDF employee round to my address to get forced action to turn off my gas supply. At no time have I received any written correspondence, or phone correspondence saying I had money owing to EDF Energy. I was formally on an agreement to pay them £70.00 per month and every month I have duly paid EDF £70.00. In conversations with EDF operators on the phone, I have been told it was fine to pay £70.00 per month and I was lead to believe that I was paying according to the monthly agreement I had with EDF. To come home to a letter threatening me with court action is disgraceful and I will most certainly be changing energy suppliers, due to the disgraceful behaviour of EDF Energy.