Money ****** from my account by DSTV - and they will not return it

On 3 June, after more than two years of being unsubscribed from DSTV, an amount of R412.90 was taken out of my bank account for no reason. I immediately contacted their call centre and facebook messenger. I was told 14 days for a refund. I contacted them again after 22. I was told it would be escalated. Nothing. After eight weeks (contacting them periodically along the way), I was told it would be refunded within 7 working days. Twenty-one days later, I contacted them again, and was told that it has been "re-escalated". I am beyond frustrated. This is a huge waste of my time, and I am not even a current customer.