Go and get rattled SSE.
You say I owe you £ 9.23 – fair enough. But you will not, repeat not, increase my monthly payment by £ 2.00.
If my consumption is the same and even allowing for a 10% increase in your already extortionate prices, at the end of the next 12 month period, I will owe you £ 19.38 and yet you will have pilfered £ 24.00 from my account.
That’s a difference of £ 4.62 and means that if your other customers were in a similar position you will have collected £ 44,323,200 more than you should have.