MultiChoice Africa / DSTV review: refund

I have cancelled my subscription on the 01/07/19 using self service and screen shot as proof of payment. My account was still being debited for august and september and october, however a refund was given for October. I awaiting my refund for august and september and have emailed them numerously. I am highly dissatisfied as I used due processes and when it comes to the refund my money is with dstv and I could have earned interest on my money instead of being in their account. I hope this matter is resolved asap.