Jet Airways — broken luggage bag

Yesterday i travelled in jet airways from nagpur to mumbai between 2205 to 2330 hrs. When i received my baggage at mumbai airport my suitcase was broken... It was proper at nagpur airport n now its useless for me i want an answer for this why so happened with my luggage... It was an expensive bag n i had used it for once or twice only n wht careless behaviour is this of whm so ever. I want some strict action to be taken on this what if while going my luggage. This is not the way to handle our luggage. I want refund for this.