Vodacom sim card and uncapped router contract

Good day. This is to express my disappointment with customer service at Vodacom. I was on the SIM card package deal and visited the Vodacom Canal walk shop to upgrade to uncapped internet data package deal. I was misled by the salesperson at the Vodacom shop and did a contract that was not done in good faith. The salesperson did not inform me that I cannot do an upgrade at the time, instead he did another contract for the uncapped internet deal and gave me the ***/1949 number to cancel the sim card deal that I initially had with Vodacom. I called the number to cancel the sim card deal but was told that I cannot cancel the sim card deal online I have to go to the Vodacom shop where I signed the contract for the sim card package and was informed that I will be liable to pay for the cancellation fees if I had to cancel the contract. I went back to the shop to inform the salesperson so that he can do the cancellation of the sim card deal or cancel the new internet deal. It was still within 14 days at the time. I also told him initially what I can afford to pay, and I do not need 2 data sim cards at home. He said he will sell the sim card deal to another customer because if he cancels the new contract he will have to pay. He promised to call me by the following week, he never called until this day. When visiting the store, I will be told to contact Vodacom online services, vice-versa. Both sim cards have been disconnected for the past 5 months but I am getting the monthly statement invoice to pay the account. So up to now the issue has not been resolved, and I am now in the Red with credit bureau.