Cell C AGAIN

Once again!! Cell C!!! They must be sick of my complaints - then they should up their service!!!!! I upgraded my wi-fi contract 2 months ago. I was sent the new sim and called to have it activated. Until today it has not worked. I was told that my old wi-fi contract would automatically fall away when the new one is activated. Guess what!! I have just received a call to say I am behind on my old contract and the consultant knows nothing about a new contract?????????????????????????????????????????????????????????????????????????????????? When I check on the number I have 33G left? Howz that? I should have at least 200G??? The gentleman who called me now did not even give me time to talk, he kept talking over me and doubt he heard a word I said!! Your service gets worse and worse.