Multichoice DSTV

I've been calling the call Centre numerous times and they not helping. i have this ref number:51801, multichoice debited more money than the usual one. they were suppose to debit 379.00 as per my 24 months contract/agreement with them and they debited 842,22 which is very annoying as this is ***** tendencies by the company. they say i did some add ons, I added movies and PVR features and that's a lie and i want proof of me requesting those add ons. I want a refund or else i will terminate my subscription with dstv. I'd rather go to Netflix than being ****med.