Poor service.... Incorrect billing

I have issue that is ongoing since June with dstv still has not been resolved unauthorized debit orders and overcharging. Very bad customer service and no senior management does not call me back. Over charging for decoder I don't have and also not refunding me when they debited mu acc.... Spoke to 11 consultants and not one can resolve my issue... Just 2 name few consultants I spoke to.Sive Ref***5-i125, Gugulethu Ref***5-i125,Noxol Ref***5-i148, Nokuthula ref***3, Amorelo Ref***5-i156, Andile Ref***5-i162, Cynthia Ref***5-i164, olwethu Ref***5-i176