Multichoice and their insurance sucks

I have received the worst service in my life from dstv. I took up price lock on February 2017 and cancelled my previous hd decoder. I also cancelled the insurance on the hd decoder when i took up price lock on February 2017. I was very happy with my explora for two months, because i took up compact plus and paid R540 for two months. Those two months of April and May 2017 were the only two months i was debited correctly. I soon found out that multichoice started taking R560 from my account saying that the extra R20 was for the insurance on my old hd decoder. I have been disputing this for 2 years now and i have never been refunded as they debited me incorrectly for the insurance that i had cancelled. I called their insurance department again today 22/01/2019 but they failed to assist. They said they cannot pick up anything from my account. Funny thing is they only cancelled the insurance on 17/01/2019 after queried again. They refuse to refund me. I am going to report this to the ombudsman as they cut my dstv for a R90 last week but refuse to refund me on the wrong debits on my account. I refused to pay the R90 untill my query was resolved which they are not willing to. I have bank statements and proof to show that they increased the debit orders. Please boycott pricelock and dstv! Let us join Netflix much cheaper, reliable and honest!