Our luggages are always delay or broken returning to HK from Italy, so I have claimed many times – from airline and travel insurance, if my luggage is broken and could not be fixed, they will give us a brand new luggage. We have luggages delayed for 1-4 days span (everyday returning 1 to us) and eventually all arrived. Don’t worry, I am sure your luggage is somewhere, you just have to keep calling them. My husband’s luggage from HK-Rome-Torino was lost for 3 days and ended up at Bologne which so happens he was having his meeting, it was a miracle this happens. As long as your luggage tag is not lost, you might still have a chance. Good luck!