O2 excuse
When I complained to O2 that they hadn't changed me automatically to the lower sim only price at the end of the contract term as their CEO had been boasting about on TV, they claimed that as it had been bought through Carphone Warehouse they couldn't as CPW wouldn't give them me contact details!!! What utter crap, as they have my billing details and they run my phone number!!!
After much fighting I managed to get "some" compensation, not the total overpayment!