Multichoice incorrect debits 9 months in a row

entered into the Price Lock agreement (R549.00 monthly) with Multichoice with my first debit date being February 2018 in which they debited R610.42 including the Pro-rata fees which made sense,however in March they chose to debit R603.74 ,April R430, May R668, June R426.79 and in July R668,August R400+ and September R430 debited once again after being promised that the correct R549 will be debited,I have contacted Multichoice for 2 days consecutively having spoken to 3 different consultants before receiving a call from a Precious Mvubu who advised me that she and her "capable" team are looking into my billing issue and she will get back to me before the end of the day which she obviously did not hence this review I have since phoned in twice and spoken to two consultants by the name of Abigail and Rosslyn who have sent her mails to please get back to me and at least let me know that she is still looking into my case and will communicate once it is resolved instead of saying that she will get back to me and not bother to.I have been going back and forth with Multichoice for months now regarding their dismal billing issue. I have phoned in for Precious Mvubu to contact me but to date I have not heard from her or her billing team.Guess I'll have to escalate this to ICASA since you my complaints have been falling on deaf ears throughout this whole year.