Shouldn’t have added Canada and Mexico to my Americas market

Does anyone have any experience with this because I’m at a standstill. Originally I only had my seller account for US, then one day I saw that I could easily add Mexico and Canada. I thought sure, why not? Then about 8 months ago, I was notified that I had to add credit card info so Amazon could bill me monthly for the ability to sell to Mexico (approx. $35 per month) There is no way I want to do that, because I doubt I would even sell much in Mexico, and could never recoup that monthly fee. Then I found there was no way to remove those Americas once you add them. Since I refused to updated my credit card info for the Mexico billing, Amazon froze my seller account across all Americas and now my books can be seen, but show as unavailable. It just so weird to have rules change, that completely shut out a seller. Any clues as to what I can do?