Supersonic - Account problems

I experienced an error on my account, and I received an extra invoice for the amount of R3819.89 which I didn't pay as Supersonic were busy investigating the error on my account, the problem post investigation is still not sorted out, and they switched the line off, my wife works for herself so she had to close her doors as she cant make bookings or send invoices without the wifi. its been a week that we are without wifi and no one at supersonic accounts can tell me , assist me or guide me on how to get the line back on, and how the outstanding amount of R3819.89 according to their records are made up. My account was on debit order so we were up to date on payments till they removed my debit order details from the system to prevent the R3819.98 from being deducted. we have been trying for 5 months to get this problem resolved, if anyone is reading this that have the details of management, please send me the details, we really cant spend hours a day on the phone with people who cant fix the problem.