Angry potential client

Went to the shop in the cbd to open new contract and I was told that I must call Tuesday which is today to do a follow up. I get the telkom shop number on google and I have been calling it and it is just engaged. I called the call centre aope to one of the rude agent whom told me that I cannot read I believe her name is Nompumelelo binga and she is working at home as 10 minutes on the call she went silent on me and she started only coughing without speaking to me. I am afraid telkom client are very angry if they really get such service from that agent and the only thing I asked is for her to get me someone who can help with the follow as I placed an order and it is pending credit check. I would like this resolved asap as I dont understand why you cannot approve or decline on the spot like other service providers.