Harrassing Phone Calls for Mesa Financial

I just received a phone call from someone named Sean at 305-396-6625. He lft a voicemail message, in very broken English, and I couldn't hardly understand him. All I could make out of the phone conversation was something about a legal file being filed against me and if I didn't call by 1:00 only GOD could get me out of this matter. When I called to clarify what he was talking about, he immediately started verbally attacking me and accusing me of not wanting to take care of this legal matter, so I needed to hire an attorney and hung up. I called the # he left on my voicemail(904-985-5008) and got another jerk that spoke broken English and was saying the same thing. I did make out Mesa Financial. I interrupted him and told him that since his collection tactic was abusive and lame, I was disconnecting the call and hung up. He called back to tell me the police would be on the way in 30 minutes. I know this is just a scare tactic and I'm not concerned, but I don't appreciate them calling my job being abusive. What can I do to make these calls stop? Sean said I could hang up and he was just gonna keep calling and calling.