I left British Gas the other month because of an issue I had with one of their staff members. The problem was, I couldn’t pay the bill by the bill date. I contacted them as they tell you to do and asked for two more days to pay - But they threatened debt collectors and a late payment charge.
I needed to submit my readings as part of leaving and they sent me my final bill shortly after for both gas and electricity which I paid in full and I was also advised in an email that their 3rd party agreed with the readings and that was that.
For some reason British Gas have now sent me a letter where they have decided that I owe them more money. But I thought I had already paid my bill to British Gas in full And that the third-party had agreed with the readings. So how do I work out if I owe this or if British Gas has charged me incorrectly, and how did they come up with the figure. I am hesitant to speak with them directly because of my experience with