Contract cancelled but still paying

I cancelled my cell phone contract with Virgin Mobile on 01 December 2014 giving them 30 days notice as required. I asked they transfer my number to pay as you go from 01 January 2015, which was done. Come end of January my account was billed with R246-00. According to customer care their billing system is 2 months in arrears. This means that your 24 month contract is now 26 months because there will be another account coming end of February.<br> <br> Thanks Virgin Mobile. The decision to cancel you as a service provider was just made a lot easier!