HDFC Bank — Fastag not delivered

I have applied for Fastag on[protected], however, even after 15 days there's no information from Bank's side about the delivery details of Fastag. Further, the customer care number HDFC Bank displays too is not working and no body at the Bank has any clue about the service and also about the delivery status. So basically no body at the Bank has any knowledge and are not able to address the issue.