Virgin Acitve Poor Service

Virgin Active has terrible administration. I called on the July and cancelled my contract with them. Then I called beginning of Aug to query why they have taken another debit order. They then say there is no record of me ever calling them to cancel and now its my word against theirs. One of the consultants Kyle said he will check for recording and then he said he cant find it. I find this strange as I cancelled with their call centre. I dont access to verify that they really cant find the call and now i'm liable for over R2k worth of gym fees.