SMS HARASSMENT

I have for several years now tried to get this firm to stop harassing me with sms messages. They have my mobile number for a Miss M Myeza who ows TV license fees close to R5000-00. I called both their offices and the call centre on numerous occasions to no avail. The phone is either dropped without a reference number for resolving this issue or goes unanswered when asked to speak with a manager of some sort. STOP this harassment or I will report this to the authorities!!!!!!!!!!!!!!!!!!