same here

sick of these calls do

If you bought a shed or other deliverable items from Virginia Custom Buildings, that's how they have your number.

Numerous phone calls for well over a month just about every other day. Never leaves a message, and when called, they say someone must have referred my number to them. I told them to not call anymore, and was told to tell them that the next time they call.

This is from a resort company. Your number was indeed given to them through a referrel. My parents own a time share and gave this company my info to get free amenities during a vacation.
I also did a reverse look up and them confirmed it with my Mom when I started getting calls on my cell phone. I just don't answer foreign calls.

can i curse them out when they call?

No Idea who they are; but I have a similar experience. Multiple calls, many on the same day about every hour. I never answer them and they never leave a message.

Getting calls multiple times, daily.  No messages left.

Many calls over several weeks from 540-434-6277
I have not answered.