Huge waste of time trying to book on this site

Tried to book twice. Each time I went through all the steps and at the end it says 'something went wrong' but no explanation. It says contact support, but there's no mention of how to do that on that page. It says 'try again' but gives the same error. Second time I started again with a new browser tab and got the same flights, same price but same error. I entered the data quickly so it wouldn't time out. It says 'hurry, only 2 seats left at this price' which just rubs salt into the wound.