Universal Travels — didn't pick the call and also left

Booked a ticket for my mother-in-law on universal travels through redbus.
Ticket no: tkcu51374136. We were waiting on the boarding point from 11:50 pm till 1:30 am. The number given during booking says doesnot exist. After calling redbus helpline, got couple of numbers which didn't get answered. Even they didn't pick the call while redbus called. I never book universal travels, but this time since redbus given good rating for this bus, i booked.

Please do something! More then money, we missed an important occasion in our family... Regret a lot!!