Airtel — airtel payment bank fastag not delivered after 40 days

Address:

Gulab khera, Rahman khera, Kakori, Lucknow, Uttar Pradesh, 227107

I ordered fastag from airtel app on 23 nov and still waiting to get it delivered. I mailed them many times and tweeted many time and each time they say issue will be resolved in two working days but still not resolved.
After 25 days they provided me a tracking number again which is showing returned to hub.
I just want my money back and suggest every one never buy with airtel app or airtel payment bank.
Each time i am waiting in long ques on toll plaza.
Third class service with most weired and cheap support