Vitality Membership

I am on Discovery Medical Aid and I also have a gym membership with Virgin Active. I contacted my Discovery Health broker to find out what it entails to join Vitality. First of all he told me that I will have to pay R1450 for subscription which I have already paid when I joined Virgin Active and he also told me that I would have to cancel my current gym membership as I will not be able to continue with my current membership if I would like to add/ join Vitality. And if I cancel my current gym membership, I also have to pay a cancellation fee. This does not make sense which I have expressed to my broker. Why do I have to cancel my contact just to add Vitality and also pay a cancellation fee for cancelling my contract that I do not want to cancel? I will be paying a monthly fee of R199 for Vitality, so why can't it be added to my membership? Discovery blames Virgin Active and tells me that it is their rules, but Vitality is a product of Discovery.