Incorrect billing amount - frustrated beyond belief!

I have been running in circles to rectify the incorrect amount I am being billed. I have spoken to 8 consultants on the 10213 & 10210 numbers & visited a Telkom store with no solution. The store would not even allow me to enter because my query was billing related. I also chatted online with 3 consultants and still no joy. I have sent emails to ***, *** & *** but I just get kicked around between the billing and the sales dept. This has been ongoing since Nov 2020. Someone at Telkom messed up the order and no one is willing to take responsibility for it.