Telkom email account not working

Have had a problem with telkom for more than a month now. Originally they blocked my account for some unknown reason and couldn't log in. They then unblocked the account more than a month ago and since then this account can receive emails but cannot send any emails to any address other than a telkom account. Their technical staff has been giving us the run around ever since. The one member of this staff promised to phone back within one hour and that was on two Mondays ago - still waiting for the return call!!!! some of the other members gave us email address's to report this fault which we subsequently did - again no response