Damaged Indian COC replacement

Respected Sir,
                          Myself Manoj Kumar INDOS NO=06YL0451 holding NWKO COC.My COC NO=NCV-1374 Received on 13.10.2011 valid till 11.10.2021.My COC get damaged due to rainy water.

Sir,
      Kindly advise me what is the procedure for replecement of Damaged COC.

THNX & BEST REGARDS
MANOJ KUMAR
MOBILE NUMBER=...