Unautorized Debit amount

When I joined discovery i received a 3 month vitality membership for free. In the 3 months I never received one call for any agent, once the 3 months were depleted my account was just debited incl vitality, I instructed discovery bank to reverse the money, phoned the call center, holding for 14 minutes being put on hold, the call just dropped, now I have to start again to be send from pilar to post to try and rectify something that I was NEVER informed about. I need medical aid, not vitality