SABC licence renewal : ************

For over a year now I have been on the receiving end of a relentless stream of SMS', WhatsApps and emails threatening to prosecute me for a constantly increasing sum of money . I have rep**** countless times both on recorded conversations and in writing to ask them to stop but the assault continues and mounts in intensity. Yesterday i received two SMS/ and two emails from different people. I have not used a television in five years. How do I stop this harassment?