The persons used this phone number to call my cell phone many many times. I answered the call, then they just hanged up, when I call back, nobody answer, and just said the voice mail not set up yet. very annoying!

Exactly what Jane said you call back & voicemail isn't set up

Told the girl I wasnt Mrxxxx   But I just bought a call blocker phone   NICE ,,
Press the call blocker button  and viola theyre history

I also got a call from these morons on my cell.  No message.

These guys don't give up - some construction scammers.