cheating vodacom

So I am an existing customer of vodacom for over 20 years, I decided to cancel a data contract which ended 3 months ago, i went to the branch and was told they dont cancel contracts and that i must call in, so the rep on the phone says to me he cant cancel and that he will change the contract to a 0 rated line and that i must then cancel it next month, i went into the store yesterday and the consultant at the store says to me that the person i spoke to at the call centre conned me to extend the contract, is this how vodacom handles their long serving clients? So it doesnt finish there, 1 and a half months ago a vodacom consultant calls my number, doesnt speak to me but my wife who actually uses that number to say that they see the package we on for the other 2 line contracts we have and that they can save us money and offer us more data and minutes for 50% of what we paying currently, so she accepted and the updated the contract, now they never spoke to me and im the owner of the contracts, this months debit comes off and im now paying R500 more... i will find a way to deal with them as the consultant at the store confirmed that they doing this to many other people. and i will cancel all contract with them plus a further 4 business lines.