You can self reschedule your ticket online. The rescheduling procedure is on eTicket under Terms, Conditions and Contact Info. Most schedules require customers to reschedule 4-24 hours in advance before the original travel date and time.

Once the date of travel has passed, the un-used tickets no longer have any refund or reissue value. Self rescheduling online is easy, and starts from $1 per ticket, while through a gotobus representative it starts from $5 per ticket. 

Please start your eTicket rescheduling at: https://www.gotobus.com/reschedulebusticket/