Airtrl — discount coupons

Address:

Shimla, Shimla, Himachal Pradesh, 171001

I have 40 discount coupons of airtel value of coupons 2000rs validity of coupons was feb 2022 it was received by me when i bought phone i have used 13 coupons after that iam unable to use these coupons every month 50 rs deducted from my bill from this month iam unable to use so many time i have submitted the complaint but no use iam very old customer of airtel they are just doing timepass from 15 days iam fed-up of this please take some action