don't give up
It seems not long ago i was looking at this thread trying to work out the best way to get thru each step. A few years on and though pilots course and living the dream!!
From what I have seen some people breeze straight in and others have to work a bit harder and wait a bit longer. The main thing is to not let set backs ruin your motivation. Keep attempting the tests, keep calling recruiting and do anything you can to improve yourself. Its a long road (something like 4 years from application to graduation for me) but it is definately achievable. Good luck!!