Undesirable,

Sorry to hear about your results.

If you can appeal the results, and get a re-test, then why wouldn't you?  You have absolutely nothing to lose.  What's the worst thing that can happen if they fail you again?  You're right back where you are now, without a job offer.  

Look at it this way.......if you get the re-test, use countermeasures and pass, doesn't this put you in a better situation than where you are right now?  Would you rather go through the rest of your life knowing that you might have had a chance to rectify the situation, and did nothing?  The choice is ultimately yours to make.  

Good luck.

Kona