Telkom contract sim not receiving calls

I had a Telkom prepaid sim which I was happy with. I was so happy with Telkom that I decided to get a contract phone with them. I asked to change the prepaid number I had to a contract and they did that.

Lo and behold the number can make outgoing calls but can't receive incoming calls. It's been over a month now and people have difficulty reaching me and I am missing some very important calls at a very crucial time in my career.

I called Telkom call centre AGAIN today and the agent tells me they have been trying to call me...wait for it...on the very same number I reported to them it being unable to receive incoming calls. I don't know why they are calling me instead of fixing the problem. Why should I be paying them if I'm getting half of what I'm paying for? Ridiculous! If they don't fix this NOW I will rather cancel the contract and go back to prepaid. They are messing up. I hope they see this and attend to it immediately. I have no tolerance for such incompetence.