Failure to cancel due to inaccurate system data - require a refund

Cancelled my contract for *** on the 3/2/2021 against reference number ***2 but due to invalid data on the system advising I was issued an Ipad telephonically in 2018 my cancellation was rejected with no feedback given. Due to being unable to get assistance telephonically I had to go into a Telkom store on the 3/7/2021 to be advised of the error and case ***3 was logged and my contract has finally been cancelled but I want the R598.00 deducted on the 30/06/2021 to be refunded to my bank account.