Capping of account

I upgraded my Telkom SmartBroadband Wireless account and requested that the contract be capped. The salesperson confirmed that it was capped before I left the Telkom office; only for me to find out a month later that it was never capped. I have send numerous emails to request confirmation about the account being capped but no one answers me. there is no number to phone and it does not serve any purpose to go back into the Telkom office close to me because they were the ones who confirmed it was capped.