What really really annoys me is when they tell you in September that "if we continue paying you this amount, by April next year we will have overpaid you by£***."
STOP PAYING ME IT THEN!!
But they don't, by April I owed them £450 and they then sent a "demand" for repayment. I rang and told them I couldn't afford it in one go, we negotiated and they were quite happy with £10 per month for 45 months, no interest!
What a waste of time