Unsuccessful upgrade

I have been trying since October to upgrade my home line from 10 Mbps to 40 Mbps. There is an internal error that NO ONE AT TELKOM is interested in resolving. I pay my account on time, why don't you want more money? I have tried online, I have phoned many times, I have repeatedly been to Telkom stores (Centurion and Menlyn) to ask for help. Nothing helps. I really do not know what to do next.