Here Comes Another Deutsche Bahn Post! Choo Choo!

Ok seriously, what is going on with Deutsche Bahn? I have been trying to book 2 tickets from Warsaw to Berlin for June 2nd, 2023. I have used numerous websites ([bahn.de](https://bahn.de), [bahn.com](https://bahn.com), [international-bahn.de](https://international-bahn.de)) every day for two weeks and depending on which website I use I get half way through the booking process just to receive a message that either says, “there are no seats left on this train, for which a reservation is compulsory” or “we are unable to sell this ticket online”.

I have contacted Deutsche Bahn 3 times about this and still nothing. What’s a guy have to do to book a couple of tickets from Berlin to Warsaw in the year 2023? I was able to book my tickets from Kyiv to Warsaw no problem and was extremely surprised to see that the Deutsche Bahn websites are incredibly buggy and the service so far has been nightmarish.

Any advice or ideas on what’s going on here? Keep in mind I started trying to book these tickets before the strike happened /:

Much thanks for any info and sorry I’ve had to turn to this subreddit for help /:

Edit: I was able to get to the payment part of 3rd party websites selling Bahn tickets, but I’m generally skeptical of these 3rd party websites especially if the Bahn websites wont allow me to purchase tickets.