I've found a call for PhD students or data scientists at a certain university. The instructions were very clear that applications would be accepted until Oct 12th 2023, and only then they would be reviewed.
However, around Oct 8th 2023, when I was going to send my application, I've noticed that the page for the call had been removed. I've managed to search the university's website and found that there was a listing of all open positions at the university, so I got the e-mail address I needed and sent it anyway.
Needless to say, I didn't even get a reply saying that that application was received nor if I was rejected, leaving the impression that the position was already occupied even before the deadline for applicants ended.
I've been spending endless hours gathering all the documentation, writing motivational letters, convincing former supervisors to give their names as reference and I feel it's extremely unfair to do so. I'd like to do something about it. However, I also understand that someone's probably already working on the project, and even if I am a better fit, little will be actually done about it.
What would be the mature decision here? I'm unsure whether the position have been cancelled or filled. Either way, I'd like to get in touch with them and see this through without damaging any possibility of applying for another new position in the future.
Also, as a follow-up question: is it common to have things like this happen, completely out of the original time table?