Air India — I am complaining for lost clothing item in air india flight

I have lost my clothing items in air india flight travelled on 24th december, 2019 from new york to delhi in flight no. Ai 102, seat no. 42c. When discussed my issue with air india customer care executives, they are asking me to drop email on [protected]@airindia.in. When addressing my issue on this email id the email shows invalid and email didnt delivered, it returned to me.

How i will be able to collect my items when air india team is not supporting.