Vitality membership cancelled without a reason why

Discovery Vitality cancelled my membership without notifying me about why they will be cancelling my membership.

They gave me an email stating that it will be cancelled and that's about it. Apparently I haven't been paying my subscription to Vitality yet, when I signed on they asked me if I would like to take a debut order and I said yes, I even told them I'd like it to be debuted from my account on the 25th of each month. They took down my account details yet they didn't capture it properly, nor did they put my account details in so a debut order could go off every month end and now I owe them R1000 for the work that wasn't done properly. This is completely unacceptable.

I hope they can fix this immediately as my gym membership fees will probably also suffer because of this.