A man with an accent - probably Spanish, claiming to be "Sam" called our voicemail before business hours and left a short message asking to be called back at this phone number regarding an account we have with his "company".  No company name provided.  Background sounds were likely a telemarketing call center.  Remember that a reputable company will leave complete information and not bait your curiosity.  Don't fall for it.

Got a call from Richard, no company name, wants me to call back about some account I am sure I don't have, blah, blah, blah..... Blocked the number!

Same deal.  My guy was a Richard