Redbus — A1 arthi travels - unethical behavior

Address:	641006
Website:	redbus.in

A ticket was booked for my sister to travel from coimbatore to chennai on 1st of may, 2017 in a1 arthi travels (A/c sleeper) departing at 21:00 on 1st may for 750 rupees. Few days back the travels called and let us know that the trip is cancelled and so we have to cancel the ticket. Even we too cancelled the ticket because the trip is cancelled. Now again we see the same bus trip is open at the same time but at an increased ticket fare of 1500 rupees. As a consumer i feel this is very wrong at two levels,
1) why the ticket charges are different on different days
2) by knowing that they can make more profit especially 1st of may falls on long weekend, they ask us to cancel the already booked ticket so that they can reopen the same service at an higher price. This is complete wrong.

And redbus is also saying that they are not responsible for guaranteeing the service or this behavior.