Frustrated ex-Telkom client

Good day Hello Peter

I've terminated my Telkom contract via telephone on February 4, 2019. However I still received bills. On March 18, 2019 I've terminated my contract again this time via Telkom app. However I still received bills. On June 6, 2019 Sibusisu from VVM debt collectors *** called to inform me that I've now been handed over, so I've emailed him proof of my cancellation after which VVM debt collectors dismissed the case as Telkom were at fault. However I still received bills. On July 15, 2019 I called Telkom again and spoke to Andile. Andile said this is a mistake and that he can see my contract has been cancelled and I should no longer receive bills. However I still am receiving bills. What more must I do???