HDFC Bank Bank Fastag — no response for hdfc fastag and from given customer care number

I applied for fastag on 08.11.2019 at their website.I got an Application Reference Number as HFR345131, where it is mentioned that PDF Application will be sent to your registered mail ID and representative will contact me. I have already made payment of Rs. 500/- through online transaction.

But till now, PDF Application has not been sent on my mail neither any representative contacted me till now.

I am trying to call the toll free number provided fastag applications since last two weeks but no one is answering or the number is continuously busy. First time i am facing such horrible service from HDFC.

I want to cancel my application and money back to my account. I have even sent the mail to fastag.[protected]@insolutionsglobal.com but no response.

I have already applied to other fastag.