Telkom unhelpful and disgusting service

Yesterday I took up a sim only Lte contract at the mall@carnival telkom branch. I was told that I only need to put my I'm into a device as it is already active. Got home, put sim into a device. SIM CARD NOT ACTIVE. Been trying to call that branch for the last two hours, no answer. I went online to try and get help from there. Somebody called me back and transfered me somewhere without understanding what my problem is.