Absolutely fuming, took out a contract with O2 via carphone warehouse for a Pixel 4 pay monthly 24 hours, had the phone a day and decided I wanted to use my 14 day cooling off period to cancel the contract and change to a Sim Only and buy a Pixel 4 XL outright , I rung O2 to merge the number over to the SIM only contract from the original 24 month handset contract and they did that fine but said the device wasn't issued as returned yet and unless it was I would be liable for a early termination fee for the device pay monthly contract and that I needed to go back to carphone and get it resolved, I went back to the store on two occasions and in the end they spoke to O2 for me and confirmed cancellation, so happy days I thought , O2 said they cancelled DD on their side to prevent any error in payment and said I can cancel my DD. I must of rung O2 about 10 times about this issue and spoke to different people every time who said this. In the end they confirmed the return and said everything was fine and nothing else to worry about. My device was returned, the new SIM only contract set up correctly with my old number, I was completely happy.
Today I receive an email saying my bill is ready for the old account and it's £600!!!
What do I do!
Help! I'm fuming!