Help – Stuck in a weird loop hole with billing

I had an FBA books account to sell some books I had, but due to a death in the family a couple of years ago i put my account on dormant and have not dealt with it since. My account credit card has since expired, and there seems to be a balance on the account as Amazon sends me monthly emails to renew my credit card. Before I want to renew my card, I would like to know the balance and what caused it.

After a call and a chat, nobody can tell me the balance on the account before I enter a new credit card which will be immediately billed. Problem is, I don’t know for how much. Neither call support or chat can access that information for me because it is ‘their policy not to do so’.

Has anybody come across this before? I don’t mind paying what I owe, but I’d like to know how much first.