Being disputed over PA.. Very worried HELP

I tried buying 400m of this guy on PA, no rep, nothing. selling it for .50/M. Anyways I sent the payment got it verified and asked him were to meet. He didnt send a messege back and has claimed I have recieved the gold when I havent.. I have disputed and have 2 pictures of my account showing i have no gold near the time I ordered to try and stop him faking it on a private server or something. Does anyone know how long a dispute lasts.. and what are the chances I'll lose my money? Thank you..

 

lasts around 7 days or so, RSPS are kinda outdated. So ask PA to show the proof, then go yourself to that exact spot and take pictures on RS.

I can almost guarantee there will be differences.

 

Are you sure..? It says here something about 72 hours. Surely it wont be a week?