Man? 14? Shurely shome mishtake!
@CM: we all get that you are bent out of shape over this. You probably brought this to the forum expecting sympathy and I guess that you feel disappointed by the response. Sorry, but Diplomacy is not a game for kids, so you should expect to be treated like an adult. After all, you chose to label yourself as a man.
First and foremost, please realise that the actual problem and the score you received is irrelevant, it will have no impact on your life whatsoever. You will learn much, much more from getting a bad score, and understanding why (fair or not), than if you had received 100%. As several have already said the person that gave you advice, which turned out to be wrong, is not to blame. At the very least, remember how it feels to be treated badly (by your current standards) and if you are ever in a position that you never treat others the same way.