Unauthorized sign up

I called hippo for a quote. They said they would call me back today with the feedback from the medical aid scheme. I did not approve anything. Now I get a message from bonitas saying welcome and here's your membership number. I did not agree to anything and hippo did not call me back to confirm the price. Moreover they gave me the wrong information. Saying that I would be fully covered, but when I called bonitas they said it was just hospital coverage not comprehensive coverage. Now I have to print and fill in forms and scan and send back to bonitas to cancel the medical aid otherwise they're going to debit my account. But it takes up to 10 working days to cancel. I cannot afford to have my account debited for something I did not consent to. Hippos service is a ****. They only want to make sales and commissions and don't notify you of the fine print.