Air India — refund of cancellation.

My flight got cancelled due to operational reason from srinagar to nagpur via delhi on 12/12/2019 and from there various flights were booked along with my family members

Totally i have cancelled 5 tickets but airindia had not refund me monwy back.. Everytime i call airindia customer care they are not able to update me status and i made no of corresspondance to [protected]@airindia.in but they dint bother to reply me... Details of various cancelled flight prn no are as follows..

1. PNR No YMVV8
2. PASSENGET NAME. mrs yeswitha gutha and miss adhira kirit
3. TICKET NO.[protected] and[protected]
4. DOJ 15/jan/2020

1. PNR No YDLP3
2. PASSENGET NAME. KIRIT PRASAD
3. TICKET NO.[protected]
4. DOJ 12/dec/2019

1. PNR No J83H3
2. PASSENGET NAME. mrs yeswitha gutha and miss adhira kirit
3. TICKET NO.[protected] and[protected]
4. DOJ 12/dec/2019

1. PNR No J83QQ
2. PASSENGER NAME KIRIT PRASAD GOGINENI
3. TICKET NO.[protected]
4. DOJ 17/DEC/2019

1. PNR No YWZ5D
2. PASSENGER NAME MRS YESWITHA GUTHA AND ADHIRA KIRIT
3. TICKET NO.[protected] and[protected]
4. DOJ 17/DEC/2019

All tickets were booked by me from my card... But no refund has been provided till date..

Requested to take necessary action.