They have been overchanging me a minimum of £11 each month since I upgraded my contract in November. At the moment, I am off pocket £70+ and there seem to be no way I can have them fix it. Every time I open a ticket they say that their accountancy section does not work, and they will open a ticket with accountancy colleagues. Well, it is March and they just set me another overcharge. £15,99 instead of £5, this time. I have paid all my phone line charges 1 year in advance, and I have a deal for £5 a month on fibre, for 18 months. Such a pity, it used to be a good company, I have been with them 10 years or so. But since 5 years it has been getting worst, first for quality of service, then for customer care (they used to be top here on trust pilot) and then accountancy. I do not know what to do anymore, but I promised them that I would write bad reviews on every website I know if they did not fix it this month, which they did not.