disgusting service with no help what so ever

I upgraded my cell phone contract in may. since June I have been billed for two handsets at the time of doing upgrade I was quoted a monthly instalment. now since June I have been billed for two handsets and my monthly billing is no where near what I was quoted. I logged a call on the 14 of October disputing my bills. nothing has happened. its now the 31st of October and after 30 minutes on the phone being past from pillow to post still no one can assist me. One department tells me I must pay the bill up to date so that they can help me. THIS IS HIGHWAY *******. 14 OCTOBER TILL 31 OCTOBER - 17 days and my dispute has not been sorted yet Vodacom is quick to cut a person off and demand money if they are owed it. Ask for a manager or supervisor and you get told they are not around. does anyone know how I can get hold of a top manager at Vodacom cause this is disgraceful. through all of this all I want to do is sort out my account and pay it.