HDFC Bank — hdfc fastag not delivered.. more than a month now after application

I have applied for hdfc bank fastag (Hfr296019) on 22nd october and i got the confirmation for the same. After a week i got call from representative for the delivery at my old address.

I then called the customer care to update the address and resend it again to my new address. They asked me to drop a mail at there customer care mail id which i did on the same day.

Post that i called them 2-3 times and send mails to deliver the fastag but no response received.

Despite several calls and mails, no one is even bothered to reply the mail or expedite the process of delivering the fastag.

Can i please get the mail id of senior authority in the bank or would be great if you refund my 500 rs. I will arrange fastag from other souces.

Thanks,
Adish sharma
Adishsharma. [protected]@gmail.com