Vodacom idiots

In February of this year Vodacom contacted me and offered me a 5gig data contract. The lady doing the sale assured me that the new sim card with 5gig of data will fit in my phone. She said that I have a dual sim phone. After I recieved the new sim, I went to a Vodacom shop and asked them to fit my new sim in my phone.The technical assistant at the shop assured me that my phone can NOT take 2 sim cards and that the lady that sold me this new contract was in fact lying to me. I contacted Vodacom on 06/03/2019 to cancel this contract, as I was sold this contract under false pretences, and thus unable to use the contract. They informed me the contract will be cancelled. And that the R100 deducted from my account will be credit to my account. I recieved ref no:1- ********** ********** to confirm this action. Then I spoke again to Vodacom on 22/03/2019 and told them my whole sop story and again they confirmed that the contract will be canceled and my account will be credited. Ref: 1- ********** ********** was given to confirm this. Now on 01/04/2019 my account was debited with another R100. Thus this ******** contract was not cancelled like they promised. Vodacom are the biggest idiots I have ever delt with. They are absolutely clueless. Can some one at Vodacom with half a brain cell please sort this mess out. Eugene ********** 375