High charge for business class flights but no service afterwards when baggage is lost! 7 months later!

Following the loss of my luggage on my return flight from the USA in March, Qatar have not responded to a single email / call / whatsapp / facebook message / instagram message or any other form of communication. The loss form was completed and submitted online on the 8th March 2022, now 7 months ago. Not a single reply. No confirmation of loss, and no ability to process a claim through my travel insurance as I have no formal communication from Qatar confirming / stating the loss. Given the absorbent charges for business class flights this is not the service I was expecting.

Flight #: QR 728 File *** Ticket #: *** Baggage Tags: AA225881 / AA225882 / AA225883