Pathetic Service and incorrect billing

Deal with a bunch of *****s... Have been double billed for my premium subscription. DSTV owes me in excess of R 6500... this goes back 3 years. Have been enquiring abkut this at my cost... only to get so called feedback today that i am still liable for the double billing. Yet to date cannot nor have provided any sort of proof wbatsoever.. . They dont k ow what they are doing... but because they hold the "monopoly" on cable/satelite tv, they feel they can call the shots... i am not finihsed with you guys yet!!!