HDFC Bank — paid money for fastag but no communication mail or sms received

I have paid 500/- for fastag on[protected] with application reference number hfr469712. It was mentioned that the fastag application pdf would be sent to me in e-mail but i have not received any e-mail or sms. Calling customer care on[protected] but no one is picking the phone.

Note for hdfc people - i have already given reference number above which can be used to get all the details regarding the application. Also attaching the screenshot.