Shockingly Poor Customer Service – Debit Order deduction but on Pre-paid

Cancelled my contract beginning of April but debit orders are still running. Was promised a call and refund on the 17th of May,…..still waiting for that call. Another debit order on the 27th of May. Phoned Vodacom today and was promised 1) Refund for April and May, 2) Letter from Vodacom stating my account is paid up and closed, and 3) Proof from Vodacom that they’ve closed my account / paid-up on the credit bureau. Olga told me she is issuing me with three reference numbers…I’m still awaiting these reference numbers and still no call back!