Telkom complaint

I got a contract from telkom on 3 October 2018, they ported my old number to the new sim. Since then people have been trying to call me and it says number does not exist. Ive been trying since then everyday to get hold of the call centre. Nobody is helpful. They put me on hold and dont resolve my issue. I went to the glen branch where i got the contract from. They told me they cant help me i must call the call centre. Which is totally useless as ive done that already. I told them to atleast cancel my contract for me if they have such a bad service. They told me they cant do that too and i should do it online. I have put a cancel request its been 2 days already and i havent got any feedback. Now i do not know what to do. I need this number as everyone has this number of mine and nobody can contact me and this number is very important but nobody at telkom is helping me out.