Cell C Fibre Support

I have been fighting with Cell C for almost a year now over my fibre line cancellation with them because it wasn’t working for 3 months (which were paid for) but they kept sending me overdue invoices and statements after the cancellation. I’ve queried this a number of times and each time I was assured that this was an error that will be rectified. The statements kept coming every month thereafter, from August 2021 to date. I contacted them yet again and they promised to “log a call”and “escalate” the matter which never happened. I’ve recently been hounded every other hour by debt collectors because Cell C has now handed over my (non-existent) account to their lawyers. I’ve called a number of times and each time I they tell me to wait 24-48 hours for feedback. I’ve been waiting for a week but there has been no communication from them, just endless calls from their debt collectors. The consultants don’t care about customer satisfaction and are extremely dismissive, none of them seem to know what the process is regarding a matter of this magnitude. Every time I ask for someone senior to expedite this matter (that is affecting my credit record) they tell me about high volumes and ask that I be patient. I’ve been sent from pillar to post with zero assistance from cell c so this is literally my last resort. I need this sorted out as soon as possible!