O2 has to have the worst customer service on the planet. I ordered a virgin media package which comes with a mobile sim deal. It turns out the sim deal is on an O2 sim. I cancelled with BT & EE a few weeks after ordering this deal. The sim never came & actually went to the wrong address, I found this out after hours waiting & being transferred on customer service. I tried many times to cancel but they told me to get a sim from an O2 store & register it & give them my PAC code to keep my previous number. As I had cancelled with EE my number was going to be out of use unless I got it changed to this O2 sim. I was on the phone to customer service for 6.5 hours, half the people telling me they have no record of me & the half seeming able to help but the call ended up dropping when getting transferred or put on hold before completing a process. I nearly had a breakdown explaining this situation calmly to each new member of the team. I ended up calling EE to uncancel my cancellation just before losing my number. The next day I went to the O2 store to try & cancelled the contract for the sim that I had never received that they had already started billing me for. After having to take a day off work, go to the store & another few hours on the phone with customer service it seemed I had successfully cancelled with them, I was told I'll receive an email in 2 weeks. I did receive an email but it was to charge me £230 for cancelling something that I hadn't received that they had already started billing me for. I have 40+ emails & around 20+ hours with O2 customer service since August when this torturous process with them allstarted. To summerize how they do business is PURLEY CRIMINAL. Kind regards Quinton Hillocks