they called my company phone not listed to my name and did not leave a message,, I called back and asked who they are, the lady said they are ATC or ACT not sure but would not tell me what they did. Before she would answer anymore questions she insisted for me to give her my name so she can look it up. I refused she agressivly said "HAVE A NICE DAY!"... and shut the phone" I would guess collections with that attitude.
Fight telemarketers and scammers the only way possible - waste their time by telling them you are interested and want your spouse to come to the phone. Then lay the phone down and walk away. They wait for many minutes and hate it when they realize they've been fooled. Or if a female caller, tell her you will answer one of her questions for every one you ask her. Then ask her rude questions about her sex life. She'll object, so tell her SHE called you.