Axis Bank — axis bank did not receive the card but received the pin no.

Address:

mumbai, 400063

Hi,
My name is roshani joshi. I have applied for an axis bank credit card a few weeks back. I did receive timely sms messages giving the application number, that the card had been approved and will be delivered to me in a few days time, etc. And one day i received a sms saying that the card had been returned back giving no reasons why. Even i have received the pin no. Through post. I don't know what is the use of the pin when the card itself is not delivered to me. I'm afraid of false outstanding getting accumulated against the card. I tried calling the customer care but the line never gets connected.
Can anyone help me through it?