Rkt Tours — bus changing

I have booked bus from pudukottai to vellore and the bus boarding time was 9.15pm but the reached pudukottai at 10.10pm. That bus is not direct bus from pudukottai to vellore. They instruct us that we should get down in trichy then they will change us to another bus to vellore. We were waiting till 12clck then his came. If they don't have direct his from pudukottai to vellore, why they're booking tickets from pudukottai to vellore. We suffered lot.