Why must i suffer when you do not do your JOB???

I booked a bus ticket on the 16/04 for the same day from cape town to jhb. I booked at USave old belhar, i told them bellville to jhb but only realised the ticket said cpt-jhb @ 17pm on my way to the bus station as the bus was suppose to leave at 18pm. When i got to bellville by the old bus station i was told they changed and since then i called all the numbers i could find but not even one office answered including the call centre. i kept calling every second and i decided to go and check by the Greyhound new station and i was told there that it moved to Train station!!!!by then already the time is 18:30 and still yet no answer anywhere. rushed to the station bt was told its gone already. I now had to book another ticket. Whose fault was it that the cashier chose CPT???? even after whose fault is it that i missed the bus due to you not answering the calls???where is the customer service??? i was early and i would have got the bus IF ONLY 1 CALL WAS ANSWERED TO TELL ME WHERE THE BUS STATION CHANGED TO!!! whatbnow?what must i do with the ticket?