Harassment and poor/rude customer service.

I have been receiving promotional calls from CellC and have constantly told them that I am not interested due to affordability and the fact that I have accounts in arrears with previous CELLC accounts but it seems my cries have fallen into deaf ears. I spoke to a lady by the name Mbali Thusini who advised that her colleagues have been dispositioning the calls improperly hence I have been receiving the calls and she will disposing the call properly and I will not be receiving anymore calls. However today again I received a call from CELLC regarding the same promotion, I spoke to Thokozile Mvubu who I kindly and respectfully explained my concern and asked to speak to her team leader and she advised that the team leader is in a meeting which I found hard to believe and told her she is lying. The consultant went on and rudely hung up while I was demanding for the team leaders assistance.