How to process Forum shipsale contract violations?

[Kharon]

I send the sum of 560 million SC to an Name (on Jul 22 2011 01:39:33 AM) the Forummember The.Merc gave me via PM (on Jul 22 2011, 01:36 AM).

Contract in Forum ship sale was made here (on Jul 22 2011, 01:33 AM).

Then I got following PM back (on Jul 22 2011, 01:41 AM)

Comes right away

payment recived, 2 mins i will setup code now

(repeat: "[...].2 mins i will setup code now", 63h ago!)

I didnt get a code nor respons till now (+ 60 hours) nomatter its Weekend, I asked that User in PM and Forum what was wrong and even saw that Forummember log in his Forumaccout inbetween (on Jul 23 2011, 12:30 AM).

So what am i to do now?
What is a reasonable Time to fill in a normal (exclusive special conditions agreed upon) shipsale contracts ?
Who can i generaly ask for help in such cases?
Who will generaly help me in such cases?

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