Called several times no message

Unsolicited calls from this number -- no message left when I was called.

Call with no message.

Received a call yesterday from this number claiming I filled out some survey on continuing education (which I never did) and when I proceded to tell the guy I had already received a call from them about an hour prior to his and I told them to take my number off their list, he yelled at me and said if I didn't want any calls from them I should stop filling out online surveys. Again, I never filled out any survey to begin with. I'm tired of receiving these harrassing calls on my cell phone.