Failure to Cancel Debit Order as Instructed.

Good Day, <br> <br> Over the last few weeks my debit orders has been returning as unpaid for reasons beyond my knowledge - on the 22nd I called the call center to cancel the scheduled debit as I would make a cash payment to club - I made the payment and on the 23rd a debit order went off AGAIN and was returned unpaid.<br> <br> I need to know who is responsible for the bank chargers charged to my account, after I clearly instructed that NO debit order is to go off my account.