Call centre apathy and uselessness

Mobile upgrades done on 10th April and have spent 6 hours in last week on calls to every single Telkom call centre and number to find out what is happening with upgrades and new services, have been promised callback numerous times and absolutely nothing happens. One call was transferered 11 times ending up at starting point again, no one ahas any idea of what is going on with accounts/upgrades etc. they fob you off to someone else making extravagent false promises. what can be done, I am at my wits end!!!!!