I have applied for a postdoc position in October 2021 by sending my application to the responsible professor by email (as it's the only way to apply) as announced in the poster (in Germany). I got an instant automatic reply email from the professor mentioning that she was away for 10 days. I never heard from them after that.
After five months, yesterday, I emailed the prof again asking about the position and if there are any updates. Today I got an email from her secretary saying that they have already chosen someone and my application document will be destroyed.
The question is, how to make sure that my application was even on the list for the competition (because I didn't get a rejection email or any feedback until I wrote them yesterday)? Is there anything I can make it to make sure the process was fair and indeed they evaluated my application? I believe the professor just forgot my application completely as she was on holiday the day I have applied.