Cancel contract , but still been debit

I phoned Tuesday, 26 January REF: S3-GKY2K-K4JYI with regards to my contract which was cancelled in November, however you still deduct money from my account. I was told that the number is no longer active but they cannot trace a cancellation??? This does not make any sense. I was told that someone will call me before COB yesterday to resolves but up until now no one has phoned. ENUSRE THAT THE REFUND IS PROCESSED IMMEDIATELY failing to which I will take this further. You are deducting money frm my account without permission and this is not seen lightly at all.