3 debit orders

Good day,<br> <br> my account was debited 3 times on the 26th even though i sent a cancellation request early this monthe,it's not my fault they are having system errors,<br> <br> can someone get back to me regarding this and this will cause a lot of inconvenience for me and is it one way of mistreating customers that they have left you?<br> <br> how is it possible that this company is linked to a seemingly reputable Cell C?<br> <br> Hope to get a respond shorty because you don't normally respond.