seller won't return my pm's

Doesnt the notification also go to your e mail? And then smart phone if he has one.

Only if you have your account set up to do all of those things.

Personally, I do not. I don't get emails, nor cell phone communications, regarding PM's. I do get a flag on the screen when I log into fabo, though.

I, personally don't care to be notified when I'm PM'd or when someone responds to a thread, or any of those things.