DSTV Billing Error

I decided to upgrade my DSTV Compact which is on a price lock of R549 monthly for 2 years fixed to a Compact Plus which offers extra kids viewing channels to accommodate my sons who was sick for 2 weeks and was confined to our home. I followed the self service app to upgrade for 1 month as this was all that was needed.

Yesterday i received a bill of R917 ( R519 Compact Plus, R 95 Extra View Fee, R119 DSTV Explorer and a R184 pro rata charge for the month of October) This is absolutely ridiculous as all i wanted to do was upgrade for 1 month which when i selected the upgrade amount on the self service app was in the range of +-R100.

Now im being asked to pay a amount which is more than the actual monthly full package of R808. This makes no sense. I made 3 separate calls to the call center where 1 agent was not very knowledgeable, another just randomly put me on hold after 15min and never came back and then finally by someone (Edwina) who finally assisted but the circumstances of the DSTV policies does not allow her to fully change and rectify the account after we spent 25min coming to a conclusion of what the actual error was. The agents all advise that im no longer on a R549 Price Lock and now insist that im on a fully compact plus deal after my installment which occurred on the 30th September clearly shows a payment of R549. I hope someone can help me resolve this matter urgently,