o2 phone scams

[Arasheed]

called 202 to cancel my account because my contract coming to an end and all the people who picked up were asking for verification codes sent to me i declined the call obviously and now my facebook got hacked right after all my photos i kept online are gone and still if i call again they ask for the same thing. i just want to cancel my account can i not do it online?

[pgn]

Should be possible if just one phone on one MyO2 account, @Arasheed - Guide: Cancelling Your Contract