What were you going for? AET
Unlucky mate, I've been in the RN since Long John Silver had an egg on his shoulder. If you need any advice PM me.
Do you know where your weaknesses were? What's your English and Maths like?
Use this next year productively, if you haven't got GCSE English and Maths enrol in a local college or get someone to teach you.
There are examples of the RN 'RT' test on the web or you can buy books. Make sure you are better prepared next time.
March back in there in 12 months time and the recruiters will be impressed by your determination.
Keep your chin up.