Amazon Seller Central Locked….in 2017

Apparently I did something in 2017 and a purchase got to the seller late; which cause the seller to have a little tiff. Long story short Amazon locked my seller account until I submiited a plan where this wouldn’t happen again. I was forthright, honest, everything I sell online I use FedEx with tracking – I taking selling very seriously. It’s almost 2025 now, my seller account is still locked. I reached out to Amazon, who told me the same thing as in 2017, submit a plan so this won’t happen again. So I did. And have heard nothing. It’s not like I’m selling nuclear secredits here, its books and electronics for God’s Sake. My account health is “excellent”. Has this happened to anyone else? Is there anyone out of it or should I stop trying?