Tech Mahindra — Booked bus not came

Address: Bangalore, Karnataka

I have booked bus from Bangalore to Erode. Bus should be there at 10.45 PM, I waited till 11.30 PM, but bus not yet came, when I checked with Other SETC bus driver, he told bus already went. Then he enquired in Hosur office, they told Coimbatore Bus and Erode bus combined and sent. But I didnt get any notification regarding that.. How can I know that they will combine bus together, If they are doing lik this, atleast proper notification should be there