DSTV refusing to payback overcharged money

DSTV charged me for Disney which i am not subscribed to through them. When I called they promised to pay a portion of the amount that they pick up. They informed me that they will escalate the remaining amount as its cant be traced. I have called four times already and the fourth time they offered to add me on price lock which is not what i want. I want my money back and not to be trapped in a two year agreement. If anything I am ready to cancel my subscription if this is how they handle our accounts.