Telkom is useless!!!

In August 2018 Telkom contacted me to change my prepaid land line to a cordless phone and they promised my credit on my old phone will be transferred to the new phone when they install the new phone which was in September. But that didn't happen. Since then I've been calling them every week and they keep on telling me it will be transferred but it's middle November and still nothing. Many promises to call me back and I'm still waiting for that.