Air India — manhandling of luggage

Address:

New Delhi, Delhi, 110007

I'm rhea, an undergraduate student studying in delhi. I had boarded the ai 466 flight from kochi to delhi scheduled at 7:30 am on 27th september, 2019 from terminal 1 and reached the igia at terminal 3 at 10:45 am.
After reaching home, i realised that one of my check-in luggage has been broken open in such a way that it cant be used further.
I require an explanation as to why my luggage was manhandled after it was cleared during the check-in. One of the zip has been broken and the lock, taken way. Even worse, the sticker stating the ownership of two of our luggages has been removed.
Since the baggage is a recent purchase, i require a compensation for the misuse of my belonging. Also, i must sadly inform you that if i do not receive a response, along with sufficient action taken, i will approach a higher authority and take matters very seriously
Thanking you.
Yours sincerely,
Rhea