O2

Hi can anyone help? I have been overcharged by 300 pounds due to a technical glitch that I spoke to O2 about last month, they changed my taroff without my knowledge and said that they would ensure that this would be rectified and I would not be charg...

Hi can anyone help? I have been overcharged by O2 due to a technical issue I spoke to them last month. They changed my tariff ithout my knowledge and I have been charged over 300 pounds on a pay as you go which is usually 10 pounds a month. I can't g...