change in seats n time without prior intimation

Location/place: Ahemedabad

Name of company/service: mukesh travel agency

Myself Amit Bhalawat and I had travelled to nathdwara for darshan n at the time of return from nathdwara I booked iin mukesh travells sit no 11 12 13 in middle raw at departure time 2 PM but they cancelled the same n shifted us in 3 PM bus without any prior intimation.