I'm afraid to say that those of us who are already in the company know what a shambles recruitment and retention is. Frankly, it doesn't get any better when it comes to transfers, movements, secondments, or promotions. There are still a few CSAs just starting train operator training from the 2017 campaign!
My only advice is to hang in there for whatever position you've applied for. There is an ongoing requirement for staff in lots of positions, so they will be compelled to process the applications eventually.