Absolutely shocking..got over charged on a months phone bill so I phoned up and asked why the guy said I'm not sure I told him why I thought it was he said I need to speak to a manager and they are not in now will call you bk tomorrow, so received a call back next day saying why, I said this is what I told you yesterday..he said pay the whole amount then we will credit you so I agreed as he said credit would be on my account for July..14th July I came home to a letter saying we require full early re payment for my phone/contract and notice of a default.so I called o2 asking what the hell is going on the lady on the phone was lovely told me to ignore the letter and I have a credit note of £31.59 she said to I can send you confirmation via email or txt I said email please so I can keep this for my file.today I receive my phone bill via email and it's full price, the £32.59 credit has not been put on my account so I have gone on to o2 chat and the lady said you have a credit of £26.62 going on your account 17.08.23. so I paid the full amount and now I'm getting a credit note lower than what I paid.. yes it's only £6 short but is this how big companies make there money, we are all struggling at the moment with every bill going up, I signed a contract yet you find ur phone bill goes up every year! The icing on the cake is to be told the credit is not going on until august this was your mistake and I'm paying for this! Absolutely disgusting i have been with o2 nearly 15 years of this is how you treat loyal customers will be moving to a different provider and recommend people to stay well clear.