Also called me and didn't leave a message. When I tried calling back it was busy..wth?

I am daily getting phone calls with message of a 2009 Maza vehicle I do not own.  How heck can I make it stop it is getting old and is always ringing in my work office and disturbing me from my work I always have to mute phone when I never had to worry about that before

I make a contact called "spam" or "zspam" to keep it at the bottom of my contact list
then I set the ringer to "no ring"
I add the annoying callers to it, and when they call again, the phone doesn't ring.
when it fills up with spam callers, I make another one, like "zspam2"

not a perfect solution, but it works for me.
I get calls from this number all the time.

3103629397

keeps calling everyday

Calling Alaska at 7 AM