Sick of the service

I have been a Telkom customer for many years, and this is not my first review about their poor service. In the past when I upgraded they never deducted their fund on the debit date. Somewhere in 2023 I was due for an upgrade and because of the poor service I refused to do the upgrade. Recently I decided to upgrade and even took out an extra line. I have never missed a payment and even when I made cash payment in the past the amount I owed was still debited without any explication. Due to this recent upgrade the exact same thing happened. No deduction and when they deducted they say I had too little funds, which is not the case. Now I am disconnected and my score has been affected. I phoned the Call Centre AND THAT was just a waist of time. I also want to know why I still was paying the full amount on my previous contract as I was due for an upgrade. I think my tone when writing this email is calm because I have been disappointed enough. I have no hope for Telkom. I am Duk.