Rajesh Travels — worst behaviors with the bus operator

Hi today i received call from the boarding point bus operator, he call and asked me to come early to boarding point i said okay but again he told me the seat which i booked that is not available so i will give other one i said okay and asked him to provide same seat or 7u he said no sir only three seats available if you okay i will block those seats other wise i will cancel, how he come to say that tell me we are paying the amount and we are choosing the seat who is that person to decide my seat. I want clarity about this issue