Hello there!
I would imagine that the number that you should use is 1(888)427-1000, however that may just be the Student Help Hotline. The Student Care team is shutting down early today. You still have time to contact someone if you would like. You could ask Student Care which phone number to use.
The Penn Foster Student CARE and Education departments will be closing early on Friday, March 4, 2016. If you need to reach out to either of these teams, please do so between 9:00AM - 2:30 PM Eastern Time. They will be unavailable after 2:30PM Eastern Time. These departments will resume regular business hours on Monday, March 7, 2016. Plan accordingly.
Of course, if you need assistance during this time, the Community is always available, 24/7, as a helpful resource.