Debit Order for price lock contract that I did not accept

Good Day, I took the price lock contract in February 2017 and the contract ended in February 2019. I was then offered another contract for two years and I declined it. The problem is that I am being charged every month for services that I did not take. When I phone Multichoice they can see that I'm being wrongly charged but they say that there is nothing that they can do about it. They have said to me many times that they have escalated the matter to the pricelock department but no one ever gets back to me and they can't even provide me the price lock contact details. The frustrating part is this is linked to the Multichoice account but they cannot help me. If I don't let the debit order go through that means we cannot watch the DSTV channels. Can someone please attend to this urgently. Currently I'm being charged R49 for the pricelock decoder that I do not have in my possession, I don't use one of my decoders because I stream but Multichoice cannot remove the R109 that I pay for the recording functions on the decoder, I'm also being charged extra R99 for Netflix. When I do my calculations I'm supposed to pay R873 but they debit R1351.03. Can someone please look into this urgently and get back to me. My contact number is *** / ***