HDFC Bank — hdfc fastag hfr817784

I paid 500rs online transaction to get fast tag from HDFC bank two days ago. But still no response from the bank on my application status. I was not able track my application status and when I tried to call customer care number [protected] its always busy. Then why they are giving this wrong number in website if it's not going to answer customer. This kind of poor customer service will bring its reputation down.