Devious with 3 months fee vitality

Discovery Vitality - so devious with the 3 months free Vitality. I had forgotten to cancel after the 3 months and they then automatically debited me in one installment together with my medical aid, so I did not even pick it up as it was not a separate debit order (thats a devious method for not separating the debits so we can pick it up easily). To top it they debit the highest premium subscription not even the lowest option without any call or correspondence. I called the call centre, and they are insisting for a one month calendar notice.