Dstv Billing has got me confused and even your customers service dept cannot explain it

I took up price lock with Dstv in November 2019. I thought it was a good deal considering that I had pricelock from 2018. So when the R749 deal expired, I took up the R799 deal.. But, DSTV has been f*c&ing up my billing and debiting my account with different amounts than what I signed up for.First it was R922, when I called in they said billing will be fixed to R799. And in the following month I paid R749( which is a difference between R908 and the R160, when it should have been - difference between 799 and 160 , which would have meant I paid 639. Now again I see a debit order of 908. My question remains as to when will I pay the 799 I signed up for. When I call in to the call center I’m being told that the access fee is not included in pricelock, which is a lie because the advertising said it included it. Also I’m being told of a decoder plan. . In all this, I’m not paying the R799 I paid for. So again I’m being overcharged, it’s R200 now if I take last month and this month. So Dstv has been made successful by people like us who continue to pay for their services at a premium, but we get **** service.it’s really disappointing and unprofessional.. every time you call you get different versions of the truth. All I want I to pay for what I signed up for and committed to pay for 12 months in a legally binding contract.