******* debit order on canceled fibre contract

My month to month Vodacom fibre was canceled, in writing, two months ago, on the 21st of January. A case was logged SR*** and closed confirming the cancelation. I was billed at the end of February, which makes sense as you obviously bill in arrears. I noticed that you then invoiced me for March which I immediately queried with a new case SR*** and behold, you actually went and debited my account with the payment for a contract thwt was CANCELED and queried. I expect a refund in the next 48 hours.