Vodacom staff does not disclose all info at store level - are they fighting for business????

Vodacom shop ill advised me according to vodacom cancellations (I have voice recording) with regards to upgrading my data account and they made me take out a new contract. So I phoned to cancel my contract only to be advised that the date of cancellation of my old contract is actually the upgrade date and not the cancellation date. So now I am sitting with two contracts. So cancellations told me that they can upgrade my existing data contract, which they did within in minutes but I have to phone another ********** to cancel the old contract. They informed me they cannot cancel the contract as it was done in Swellendam store and I have to go there and cancel the contract in store. Ok I cannot go there so I phoned to be informed that they cannot cancel the contract as they did not misinform me as they cannot upgrade a data contract in store and I can do what I want as they were not wrong. (even though they did not advise me that I can do it by phoning into head office....) Very much adamant that they were not wrong!!! So I phoned cancellations and ..... being put on hold and then onto customer service etc etc..... What now!!!!!!