The office is a reseller for the transportation which means they will drive you over to the van bus station to board the bus. Location is good only a short walk from Chompon train station assuming not a lot of luggage. Staff was helpful and we'll spoken in English.
It was a decent ride, but i felt it was weird they asked me to pay for a second seat for my luggage(yet, everyone else had bags that they piled on top of my luggage, is everyone paying for second seats?)
We got a taxi from Chumphon to Ranong after getting the train from Trang. The train was nearly one hour delayed so we were very pleased that our driver was there to meet us. I had managed to WhatsApp the company to explain the delay and I hope the message was passed on.