Indigo Airlines - Irresponsibly cancelled well planned flight

This is regarding our bad experience of INDIGO Airline.
We booked our flight from Delhi to Bangalore with booking number *********** (dated **rd Dec. to *th Dec.****). While coming back from Bangalore to Delhi (Flight *E-****) they rebooked it and we (four of us) had no clue about this time change.
Our returning time was *:**PM to *:**PM but they rebooked it for way to early which was *AM. We were told about this change when we reached at boarding check in gate. On our objection on this change they simply cover themselves by saying they sent text and that’s all they are require to do. Out of *, two of us were sick, still they gave us long waiting, without any complimentary refreshment, on top of that gave us connective flight from Bangalore-Hyderabad to Delhi.
How irresponsible they behaved with us. No sense of responsibility.
If we cancelled flight, we get this penalty charge and we are bound to use all way to contact airline to inform them, but why INDIGO doesn’t abide by their own rule.
Changing flight without proper reason is UNETHICAL. INDIGO said due to winter they had to change our flight. Then how come there is another flight were taking off on same time?
WHY Indigo forget to consider consumer availability before going ahead in rebooking our flight * hours early? Do they think according to their changes consumer will adjust their plans and work?
With these all Indigo doesn’t feel shame on arguing with their hurting customer who are subjected to their force changed in flight time. With so much pride they offer refund instead of apologies.
Not only that they carelessness people when it comes to manage luggage too. You can see in picture my suitcase is fully broken.