DSTV refund my August subscription immediately

I cancelled my Premium subscription before the end of July. Then on 1st August, my bank account was debited for the full monthly premium. I called them on 2nd August and they told me that they would refund me immediately. Today, is the 9th September and I have yet to receive my refund. It is so difficult to get hold of someone to speak to about this. I have tried their Whatsapp communication line to no avail, as well as tried calling them several times and also tried communicating with them via their DSTV.co.za line again to no avail. I am bitterly disappointed with their non-payment of my refund. I don't have DSTV and I dont want DSTV that is why I cancelled my subscription. Besides being outrageously expensive in comparison to Amazon Prime Video, Apple or Netflix to name but a few. There are so many repeats and they have stopped some of the best channels around. Please help me get my refund back ASAP. Thank you