DSTV KEEPS DEBITING MY ACCOUNT!

My bank account keeps getting debited for my mother`s dstv subscription even after I have called on numerous occassions to have this rectified. I also spoke to an agent in May who promised that this would be fixed but I was debited again on 27.06.2020. This is really frustrating because making a call to you call centre does not come cheap and I cannot understand why the hell my account would get debited when I nor my mother have never given you that instruction. I expect this to be resolved and for my money to be refunded as a matter of urgency!!!