Terrible service on 808 helpline

Over the past 12 days I have made 42 calls to the 808 number. On most occasions the calls get disconnected before I get to speak to anyone but not before I have listened to a good dose of waiting music. Today I have been disconnected three times while speaking to various consultants (Lerato, Lebogang and Themba) and not once have they bothered to call back. Just today I have spent 72 minutes in outgoing calls to 808.<br> My upgrade got bungled and and today I received a bill more than 4x my usual amount because I have been paying out-of-bundle amounts. Nobody can help me - after lengthy explanations (starting at the beginning with each consultant) they all claim to log queries and when I follow up (at great expense of time and frustration) I get told it was logged in the wrong place or some such nonsense. Why can a company this size not respond to a fairly simple query and fix their mistakes? What other route do I have as a customer (of 15 years) to get some assistance?