The Call Handler or auto-attendant that your office uses is managed by ENCS at PSU.

You can submit a service request at the link below to have these changes completed.

https://pennstate.service-now.com/sp?id=sc_cat_item&sys_id=54cdf4a40feda600fe13f08ce1050ec7&sysparm_service_offering=5aaedfba0ff1b100f178317ce1050e2e

Once the request is submitted it will be assigned to someone on their team for provisioning/programming.