This number is a fax machine that keeps calling the house at 9pm at night

This number has been calling me every 5 min. since 9 a.m. this morning. And when I answer, all I get is a beeping tone, (not like the standard Fax sound). I called the number, (after I received 17 calls from them)  and I get a message that says, "All lines are full at this time, please call back later." Very annoying, I can only guess that their system is stuck in a loop!

Fax beeping noise on voice mail.