Debited my account 8 months after I canceled

Yesterday Multichoice stole R868 from my account. I have NOT been a client of theirs since January 2015.<br> I contacted them. The agent first said that that was strange and then blamed a system upgrade in July which activated canceled accounts. A refund was initiated while I was on the phone.<br> Why was this not corrected for the August run?<br> While I do have sufficient funds, other people may not be as fortunate and may have lost no claim payouts etc.<br> Why was I not contacted and how many other ex clients are affected and don't even know it.<br> In my view this is theft but there may also be PPI breaches etc that would need to be considered.<br> Honestly I can't understand why they don't clear a client's ID and amend the bank account number when customers leave. It is just safer for all parties.<br> <br> <br>