Bad customer service

Went to Phola mall to take a contract, the Vodacom consultant named Johny firstly forced me to take a phone that was way out of my budget because apparently that was the only phone vodacom offered me. Secondly I asked to be billed on the 7nth of of each month because I'm self employed instead he stated that I said I want to be billed on the 25th of each month, this caused the payment to bounce everytime and I get to be charged an extra 100rand every month! Thirdly he never even gave me a contract for my phone only a paper written "new activation quotation" was then asked to pay 105 in store for activating my Sim card but numbers never showed everytime I received phone calls. Called vodacom customer service to lodge a complaint regarding all this but couldn't get helped by 3 different consultants or at least be told where I can get help regarding this matter! I feel ****** by the vodacom sales agent and it hurts that I can't even find help regarding all this matter