Hi, I recommend getting a Transmart bus from the new station near the Football Stadium in Warsaw, it's about 38z if you book in advance and takes about 3 1/2 hours.
If you haven't already been to Wlodawa and you need help please message me as I live here and may be able to help.
My Polish isn't great, but if you need someone I can get one of my teachers to help you.
The mosquitoes are bad here, but this year has been really good so far :)