DSTV- putrid customer service

In August 2019 I canceled my DSTV with multi choice as I opted to use netflix and other streaming. DSTV kept my account active for a few days in September. They are now demading R280 from me for the days that the acoount was still active and viewing was still open for use. They now claim that they have no record of me canceling my subscription with them and have handed me over for debt collection. I am disgusted in their service.