PRICE LOCK PACKAGE OVERBILLED

I have had issues with my Explora Price lock being overbilled since November 2020 when i subscribed to the package, I logged a complaint on the 9th of February 2021 on HelloPeter after almost 3 months of calling in at DSTV with no assistance, On the day of my complain i received a call from a lady by the name of Cynthia she confirmed that my account was indeed overbilled and that they have sorted it out and i am on a Price Lock of R499 for explora.. and i got credited with R344 for all the overpayments.. February month end I paid R250 on a bill of R233.. March I paid R452. But April 30th it says I need to pay R702.. Now the question I have is that why is my account going up again instead of remaining on the price lock as promised and as per my contract with DSTV? My price lock contract is for 24 months, and this is my 5th month but I don't have any understanding of it.. What i need is for my account to be on price lock like i committed myself to paying and the rest will be me honoring my contract with a payment monthly.. This kind of stress is really not necessary and not needed if administration of contracts where done properly and correctly by the billing department..

I hope this time and for the last time my account can be fixed or else i am taking this further.. R702 on a R499 Price lock package is day light *******.. There's someone whose not doing their job correctly and their mistakes are costly financially and emotionally..