Very poor service from Dstv

I have contacted Dstv 3 times during the past two months to arrange for the reduced subscription they offer existing customers. For the last two months I had to pay an increased amout after arranging for the reduced tarif. I contacted them again and it was confirmed that my subscription will now be R864 per month. I just received ab sms to inform me that my DO for April will be R1029. So clearly they do not want me as a customer so I wiil contact them to cancel my subscription. It is not as though I requested for a reduced subscription. They offered it to me.