If you want a live response, your best bet is the WiFi room on Pokémon Showdown. I have made many successful trades in here. Make a request in chat but don't spam it incessantly. They do have some rules that you have to respect.
Wait, what device are you using? Can you clarify? If you can't load reddit, you might not get Showdown either.
If moderation determines this isn't helpful my answer can be converted to a comment.