Purple Metrolink — automatically altering the bookings

We booked their Metrolink Volvo bus tickets from Pune to Mumbai last week.
The journey was at 7 AM at Wakad Pune.

For some reasons they cancelled the bus, which is all right, they might not have got enough passengers. However instead of asking what to do they directly re-booked us on 9 AM bus.
We might have had selected 7 AM keeping in mind need to reach Mumbai by 11 AM. This requirement was not considered by Purple Travels while rebooking us. They should have called us and checked our preference, else cancelled the booking and give us refund.