Thanks everyone. This is really helpful stuff. Just getting on with SAR now. Will post up a chronology later when I get a response and have a bit more time. Thanks again

Hi We closed our account with Npower in april this year. Before closing we were informed that we were £300 in credit. 2 weeks ago we received a final bill of £1577.24 When I spoke to the operator he informed us that we hadn't been billed for gas since sept 2013. I questioned this and suggested that even if this was the case we had been paying £100 per month and that this should have covered close to what we were using. When I was also surprised as our meter was read by a reader on christmas eve. I then enquired about the excessive electricity costs. The operator said that the meter was read at 12150 when in fact the final reading was 5958. We have now received another final bill for £873.81. I am also think this bill is a bit dubious as on the same page it states that our estimated duel fuel consumption this year would be £1150. We are at a bit of a loss as to where to start with all this. I have no way of checking their facts and charges and I'm also extremely unhappy that they (and for that matter I) haven't noticed that we haven't used any gas for 2 years. I just get the feeling I'm being shafted and would be really grateful for any help from someone with a bit of experience in this area.