You haven't asked a tax question. This forum is open 24 hours 7 days a week and mainly answered by users. We do stay late sometimes. The Customer Service line is open 5am - 5pm Pacific time (8-8 Eastern) 7 days a week until Oct 25, 2019 and open until 9pm Pacific (midnight Eastern) on Oct 15, 2019 the filing deadline.
So they just closed. You only get a phone number when the office is open.
Try asking your questions here.