Want to upgrade > ZERO SERVICE!!!

Been trying to upgrade my phone line since 5th November. Been phoning Vodacom at least 3 times a week, sometimes more. When I get through they are either off line or need to refer me to someone else and I get cut off, or they need to send me an email with the upgrade details - which I never receive. This is totally ridiculous and I am very tempted to cancel my contract and move to a competitor! There is no lack of competitors in the market! I am so perturbed by this experience at the moment and am sick of trying to phone and hang on the line for someone who knows what they are doing to pick up the phone! Vodacom should actually be calling ME to ask for an upgrade!!!!