My call is too boring for CELL C

Last Friday(29 Jun), I phoned into customer service to do a swim swap. I must first applaud Cell C for their security check for doing this. BUT, the person who I spoke to was really tired, or my call was boring because he kept yawning into the phone. I could not hear anything what he was saying. I phoned back & asked to a team leader & mentioned my bad experience. He said he will listen to that call. But I did not get any feed-back for the rude behaviour of the agent R Moonsamy