someone keeps hanging up

I keep getting the same thing

They called me earlier doing a survey and offered me some [***] at the end and i hung up. They again called 4 hours later and when I said someone called me earlier from them, he said well uhh and hung up. Guys name was trevor.

I have gotten repeated calls from this number.they called asking for my parents and seemed semi professional.however,they called ..never left messages and called and hung up,who has time to do that?!?
I also know it's a number from Bethlehem

Keep calling me but they won't leave a message.