I have been charged MX subscription fee multiple times over the years altough I have never sold or listed anything there. It seems that sometimes the Amazon systems "slips" a listing to Amazon MX without my consent and then they are happy to charge me the subscription fee. The only way I can see this is from my account balance.

I only sell FBM from Europe.

I am also unable to close the MX account or downgrade the MX account to individual. When I try to chage it, it says like this:

"Individual plan is not supported in this marketplace. Your listings here have been deactivated and you will not be charged subscription fees for this marketplace."

Still, with this statement in my MX account, they are going to charge me again, because there was one (1!) listing that somehow slipped from my European listing to MX. I complained about this last year when I found out that they had charged me hundreds of euros since approx 2016. They refused to close my MX account or refund me and now they are charging me again.