Vodacom poor service

Worst service ever. Two weeks ago a consultant phoned to inform me that I am suppose to get a discounted fee. When checking she informs me that I am already receiving the discount and dead goes the phone. Now my bill is almost double and on enquiring the problem I am told the discount was cancelled. Their consultant Julius Masima is very arrogant and tell me she cannot log my call if I ask her questions. For my 3G contract I phoned 6 times to cancel to be informed that I can only phone on the 1st of the month now I am billed again because I only phoned on the 1st and didn't give 30 days notice. Vodacom *****s money and gets away with it