Can’t schedule an appointment no matter what I do

I can’t schedule an appointment no matter what I do. Netherlands Schengen, Houston office. I tried 4 different devices-not possible. 1)It’s always all slots gray or sometimes they available, but when you click on it and proceed for payment- it shows, that slot is booked. Please don’t tell me that it’s really booked!!! Because it shows this no matter which date and time you choose. 2) Currently, I couldn’t even put my personal info. It shows error message. I also tried everything on this planet.

All that customer support is doing - ask you to try latter. THEY'RE NOT HELPING, BUT JUST WAIT UNTIL YOU GIVE UP. They know, that website is not working.

Website problem is obviously global. Why every customer should send you this proof again and again??

They also don't want to schedule you by phone As a customer, I don't understand why I should experience that? I'm holding money in my hands, but you don't want to take it. Website - not working Phone appointment - not working.

How people even come to your office? I'm pretty sure that you're always unbooked. It's so stupid to me, like you're loosing customers, because you don't want to book them