dstv overcharging clients

client number *** i wrote a review on the 24/06/2020 about dstv overcharging its clients during lock down period,and on their response they say ,i upgraded on the whats app self service,this was not what i wanted to do, and that self service most of the time doesn't understand what client s want.

so they say i owe them of which i wont pay because i never asked to an upgrade and they should actually close that service because its not helpful,however my query is still not resolved to the fullest or to my satisfaction.