My partner rented a bachelor pad until January 2013 & had npower to supply electric. He was always in credit & happy about it but unbeknown to him, they put his direct debit down to ten pounds a month due to his credit. After moving out, he got a bill for £700!
As they never notified him of the direct debit change, they seemed to accept fault & never got back to him about a final Payment.
Now, over a year and a half later, they've just sent a reminder.
We have no means to pay this back now we've a mortgage & baby on the way. Can anyone advise? X