HDFC Bank — fastag

Hi i have paid 500/- from my hdfc savings account for hdfc fastag sticker on 13th of november-2019. Till today i have not received any email / acknowledgement / call. Either return money or send us the fastag sticker. Ref no is hfr367989. This is worst ever way to get hdfc fastag. The email id for complaints given by bank is not a valid one and the customer care number is a useless one. No one responds to it. Request someone from government to intervene and make a smooth way for getting fastag. It doesnot make sense charging double the toll fees after dec first instead address these kind of issues first for customers.