Who called from 3174475488

This number keeps calling I called it back it is a market research firm. ARGGH

I ANSWERED WORK AT MY PHONE LIKE I ALWAYS DO, "THIS IS KRISTY HOW CAN I HELP YOU?"
JUST SAT THERE, YOU COULD HEAR TYPING IN THE BACKGROUND AND THEY DIDNT SAY A THING. I PUT PHONE ON MUTE AND THEY HUNG UP.