Cell C - Account Issues & Line Suspension

After successfully resolving an outstanding account due to Covid related issues and Cell C receiving payment according to agreement and my phone reactivated on the 24th July 2020, I have now been presented with a new bill which is only due on the 1st of September and now my phone has been cut again without any notification. Customer Services are not helpful at all, saying that I need to pay the amount of the bill which is only due on the 1st September 2020 now before reactivation.