The "MINTO" is more than likely Minot. It's a North Dakota area code. It might even be the telemarketing firm that's in Mohall, ND. I used to live there. It's called MTI (Midwest Telemark International). They're rude because that's the way those people are in that town. Lots of small, small minds there.
These are telemarketing robocalls trying to sell health insurance. Like I'm really going to buy health insurance from a cold calling, telemarketer from Minto, North Dakota (population 602). The mouth breather who called had trouble reading the script when challenged by any word that exceeded one syllable.