Calls 3 times a day, never leaves a message and no one is there when I pick up.

Same problem. Calls coming even at night after 9. I blocked it, see what happen.

over ten calls in two days, no messages.calling the numbers results in busy signal

I was called 8 times in the past 24 hours and many while I was sleeping in the middle of the night being that I'm deployed.

This number calls my cell relentlessly day and night.  After research I find that it's just another phone scam / robo call.  I never answer #'s that I don't recognize.   Time for me to block these annoying pests.   I can't imagine any phone scammer / telemarketer being able to make any money now days.  Most of us are too wise, and never pick up the phone if we don't recognize the number.  They are wasting our time and theirs.  Go away you phone scamming annoying little pests.  You're like a gnat flying around my face that won't go away.  lol.