Qatar Airways - NOT ALLOWED ME TO BOARD

I HAD FLIGHT FOR DELHI TO BAKU ON **-**-**** AT **:**AM WITH QATAR AIRWAYS.
BEFORE BOOKIG FLIGHT I TALKED TO CUSTOMER SERVICE OF QATAR AIRWAYS AND ALSO CHECKED ON QATAR AND AZERBAIJAN WEBSITE REGARDING THE TRAVEL DOCUMENTS AND AS PER THE CUSTOMER SERVICE AND WEBSITE I CARRIED VALID VISA OF AZERBAIJAN, VALID RETURN TICKET FROM BAKU TO DELHI, HOTEL BOOKING, NEGATIVE PCR, TRAVEL INSURANCE, VACCINATION CERTIFICATE, AND VALID PASSPORT.
YESTDAY I REACHED AT AIRPORT AROUND **:** AM AND ENTERED IN THE QUEUE FOR BOARDING BUT GROUND STFF BEHAVE WAS VERY BAD THEY DIDN'T EVEN SEE MY PAPERS AND TOLD ME THAT WE WILL NOT ALLOW YOU TO BOARD WITHOUNT ANY PARTICULAR REASON. AFTER REQUESTED MANY TIME I TALKED WITH THE MANGER AND MANAGER BEHAVE SAME LIKE THAT EVEN HE ALSO DID NOT SEE MY PAPER AND TOLD ME THAT GET OUT FROM HERE .
I REQUESTED HIM TO GAVE ME IN WRITTEN WHY YOU GUYS NOT ALLOWED ME TO BOARD AND IM LOSTING MY TICKET THAT'S COST IS ***** , RETURN TICKET AROUND *****, HOTEL COST AROUND *****, VISA COST ****, BUT HE DIDN'T CONSIDER THIS.
EVEN I MADE A CALL WITH CUSTOMER SERVICE OF QATAR AIRWAYS AND THEY TOLD ME THAT THEY CAN'T STOP YOU IF YOU HAVE REQUIRED DOCUMENTS EVEN THOUGH THEY DIDN'T TALKED WITH THEIR CUSTOMER CARE ON CALL. AFTER A LOT OF EFFORTS I CANCELED MY BOOKING AND ONLY GOT ***** RS. MY TOTAL LOSS IS *LAKH BUT I GOT ONLY *****.