DSTV / Multichoice

My monthy DSTV deduction is R899.01 The 29 Jan 2022 it was R2455.01 The 1 March it was R662.94 There were NO reason for them to alter the payment amount. I have made 6 calls until Friday 2nd March where I hang up the phone from frustration and lack of professionalism. The previous 5 ALL promissed it will resolved within 7 work days. Why even 7 days to resolve if they can change the debit order as they want without my approval? THERE SERVICE ARE **** !!