I was an O2 customer for 8 years in Germany. When moving abroad, I ensured on four separate occasions (once online, once via phone and twice in person) that the account was closed. Sure enough, I get an O2 bill sent to my new address overseas. I have called customer support numerous times and they cannot resolve the issue. They want to send a code to the phone number that no longer exists and want me to access the online portal related to my account that also does not exist.
