Vitality deducting without consent

It's already a month and I'm still waiting for vitality to refund me. I didn't give consent to join vitality. The agent who contacted me said it's a free trial and said she will call me back and find out whether I want to continue or not. Just for me to get a surprise and be charged two months a premium of R858 for something I don't want and didn't use. I contacted discovery multiple times to follow up and they just tell me they still need to investigate! How long does it take to pull up a call and make a decision. The service is disgusting because each agent just tells me they are investigating! I want my money! This month I was deducted another R858 that came off my payslip, why hasn't vitality sent proof of cancellation to my company now I must run around and sort the issue out! This is unacceptable and poor service