For instance, I went through quite a Kafka-esque nightmare just a few months ago. Something got messed up with our order software so that when we shipped something it wasn't marked as shipped and the tracking info was not uploaded to Amazon for a few days during a busy season. Customers weren't complaining since they were getting their stuff. Amazon sent a warning that our late shipment rate was too high just an hour or so before they sent an notification saying we lost selling privileges. I immediately figured out what went wrong. I got the order software working right again, and I manually marked all the "unshipped"-but-actually-shipped orders as shipped and added the tracking. I wrote to Seller Performance about this, exactly as they instruct you to. I explained what happened, showed them how I fixed it, and explained how we'd ensure it didn't happen again. Their response was simply that our late shipment rate was too high and that my account was suspended as a result. I sent the same info I had sent, and this time included full tracking info for all of the affected orders (and by this time most of them had already been delivered). I received the same response as before. I tried doing their "Contact Us" methods, but no one would respond to my messages or talk to me on the phone, since the account was suspended. All anyone would say is that I need to contact Seller Performance to attempt to get back on. Finally, after several emails to Seller Performance about this, where I basically explained the situation and how I fixed it and how all the supposedly-unshipped orders were actually fine or already delivered, but just phrasing it slightly differently each time, I was unceremoniously let back on, more than a week later. I asked very politely why it took me so many attempts to get back on, even though I just told them the same thing each time, and they said they could not discuss it, and that I may have my account suspended (!) if I contacted them again about this.
So maybe you've had an experience having your account suspended on Amazon that went smoothly, but that's definitely not how it always is.
i'm just guessing here.
After getting frustrated with the absurdity of that situation, I contacted support and they said it was a mistake and they reset my account and to try again. I did. Same errors. Then support told me that if I didn't submit ID documents within a certain number of days, my account would be permanently closed. I responded saying I had been trying to do so repeatedly over multiple periods of time and constantly got locked out and prevented from continuing every time I tried. No reply. Then a final announcement my account was permanently banned.
In the year since, I've contacted them sporadically trying to see if they've changed their policy or will reconsider, and just get blanket statements about my account being closed and nothing they can do. The last time I did this, they got fairly aggressive and said they could not and would not be reinstating my account, would not tell me why, and would not respond to any further inquiries from me.