I am on pricelock with monthly premiums of R879

I am on pricelock with monthly premiums of R879. On the my dstv app, my account balance is showing as R922.99. I have tried in vain to get response from DSTV Multichoice as to the reason for the higher account balance. Multichoice, please confirm if pricelock at R879 is still active or not and the reason for the higher charge for April 2025.