Terrible Customer Service, Shame on you Cell C!!

I have cancelled my contract with you that ended on the 08/08/2017. I followed cancellation procedures and phoned on the 08/07/2017, one month before to cancel my contract. All went well and I was informed that my contract will be cancelled on the following month, the 08/08/2017. I was also informed that i will still pay my monthly fee in July, which is fine. On the 15/08/2017 the debit-order went off again? This is not right as my contract is cancelled. I have phoned and spoke to a few people regarding this problem? No answers as of yet, or feedback? When will this money be refunded as my contract was cancelled already??Your accounts department stated that the account has NOT been stopped even though the contract has. Please communicate that no more debit orders should be processed on my account. When will I receive my refund? I have then again been in contact with you call center and per email on the 06/09/2017. They just rep**** and said it has been passed on to the contract department. Still nothing further. Communication is key!!!