How can I reactivate my account?

I wanted to start selling on Amazon, however after creating my account they immediately suspended it as they wanted to further verify my identity.

They say I have to plan a video meeting for that through https://sellercentral.amazon.com/mario/inpvMeeting/appointment/global?mons_sel_locale=en_US and then selecting United States even when I do not sell in the US. When I try to do that, I however get the following error: “You have not yet registered SellerName in .” (well, in Dutch and with my actual seller name instead, but it does actually say “in .”). When I instead try it with choosing my country, The Netherlands, I get the following error instead: “Invalid request URL from client” / “The requested URL is not well formed.” After logging in again, the United States option even disappeared.

I have tried contacting Amazon, however it feels like I am not speaking with a real human that actually understands my problem. Instead they just repeat the instructions they originally gave me that do not work.

Does anyone here happen to have any idea how I could plan the video meeting so I could reactivate my Amazon account?