Indigo Airlines — damage in fragile baggage and discourteous staff behaviour

Flight no 6th kolkatakana to lucknow date 16.11.2017. Fragile item was delivered completely broken. Broken piece silently kept at e ground. Staff is saying that indigo is not li able for damage. But we assure to handle with care for fragile items. You can lodge online complaint. There is no one at lucknow airport to listen to us. Is this then way to deal with your passengers. At kola ta, cisf security staff told us that glass item not allowed in hand baggage. We gave it as fragile check in baggage. We found all broken frames at lucknow airport. This type of service compells passengers to look for other option. We lost a good amount more than ourghost fare. All glass and frame were broken. And i regret to say that instead of apology your staff is bluntly saying to make an online complaint. Which is very shamefully. My seat no.14 def 15th. D. Whether your staff handled with care. What we come to know this whentry we are receiving broken items.
Please look into the matter and do the needful.