Keeps calling, then hanging up

It is a magazine marketing group from SLC area.

This number keeps calling at least three times a day and hangs up.

They've been calling week days for at least 1 week now, 3 times a day!  I did answer once last week, and there was a pause before someone answered back so I know it was a telemarketer.  I just hung up, but apparently I should have told them to quit calling!

calls 3 to 4 times aday only rings 3 times