Dstv Premium downgrade reversed by system

Good day Client ***4

I have been a multichoice client for almost 10 years. Then Covid 19 came and I called in to downgrade my package. That only lasted a month before Multichoice started to bill me for both Premium and Compact plus. They also took the money by debit order. They explained that the system did automatic adjustments. Long and short,I have been struggling from July to get my money back and canceled the complete relationship. Three consultants later and R200 in airtime, they refuse to pay my money. Please help!