[Resolved]  Indigo Airlines — mishandling/ lost baggage

I've never found an airlines that's poorly managed as indigo. They have a poorly trained staffs from the counter till the flight attendants. They have no sense of responsibility for customer comfort nor baggage. I know it's an economy class, but for the amount we pay you, we should be promised hospitality and comfort at least.
In the transit, i've lost my black colour bag with all my clothes, my books and gifts for my family in it. I've complained to qatar airport about this and their still tracking...