Invoice of R3900 due Autopage error

I logged a complaint about an error that was made on my upgrade package, no one has ever called me back. I kept calling for feedback about reversing the charges. I was told last week that charges would not be in my April invoice and they were apparently this was never logged. Now my lines have been suspended I cannot make outgoing calls or receive any calls. Every time I call I have to retell my story and I am told it will remain an open line until July how is that the case when you're agent is the one who made the error. I am given a number *** to talk to a manager but I never get a manager. can someone who can help contact me on my work number since my sim is blocked instead of me spending half my morning being transferred from 1 agent to another....!!!!!