We have just received an invoice going back to 17 July 2007 for nearly £9K from Scottish Power. I had been expecting a bill for about a quarter of this. Apparently, in the past they have not applied the 'Multiplication Factor' of 10 which is the reason the back billing is so much.
Are they allowed to back bill to 17 July 2007?
Were do I stand with regards to the error is their invoicing? (I am not disputing the actual reading)
If I have to pay is there room for negotiation of the amount and the time to pay?