query

I received a call from mondo Telkom mobile consultant selling a contract mobile phone. I then informed the sales lady that I already have contract with them, and she said the first contract will be cancelled. I therefore agreed to the deal and I received the mobile phone a week later, but before I could use the mobile I called their to make sure if I understood the sales lady very well, and only to find out I was mislead. I therefore cancelled the contract immediately, and I was informed that the mobile phone will be collected. I waited for weeks for it to be collected until I decided to go to Telkom store in vaal mall, and asked one their consultant to call mondo mobile, off which he did, and promised to come and collected the phone. they did not instead they deducted money from my account without my permission, and I reversed the money and I send them an email to stop this transactions and come collect their phone. they sent back an email saying that they have received my query. today 2020/05/15 money was deducted from account again, I don't know what to do anymore. please help