Who called from 6186634497

This number has called me a few times claiming to be a local employment agency. But when I ask who they are calling for they hang up. I am thinking scam.

Don't want this person calling me , the person don't leave a message,  so it must not be important

I just called it back and it said the account in not valid 3xs and then a busy signal , what Bs

They have literally called me three times in a row, back to back. Never leaves a message.

Have called me for a month now 3 to 4 times a day leaving no message!