they keep calling and hanging up

Some lady mumbling and talking fast. Said she was with some obscure company name. Greeted me with "Hi." She didn't even know who to ask for when calling my number. I hung up on her and they haven't called back. Yet.

This number appears to contact me every day at least once a day,  I don't answer.

Call came in and I answered .  Big mistake!!  Someone by the name of Stacy stated she was from United Insurance and was sending me a comparsion quote.  I told her I wasn't interested and no longer lived in MO so don't send.  I had to repeat this multiple times before she finally hung up