Broken luggage and bad service

I flew with Mango Airlines on Sunday the 3rd of December. When I received my luggage, the metal ring through which one hooks a lock had been broken off completely. Even though I had an expensive universal lock that can be opened by baggage handlers all over the world. Once my bag was open I noticed that one of three boxes in my luggage had been torn open completely and only a small piece of the box and the content was left in my bag. There was no note or written excuse as to why the zip was cut open. I can no longer use my suitcase, since I am not able to lock it anymore! Futhermore, I send them an e-mail more than 48hours ago regarding this matter and I have not heard anything! Very disappointed!!