Showmax and Vodacom *****s from their clients

I have been trying since last year to cancel my showmax which is billed through my vodacom account. I have been to Multichoice which I cancelled last year, I have been to Vodacom numerous times, but they keep referring me to showmax or multichoice. Everyone keeps sending me elsewhere. I have not had any showmax service, I dont even have a dstv decoder, but vodacom keeps deducting every month. Showmax says they never received any money from them. Where has my premiums gone ?