HDFC Bank ATM Card got blocked

Location/place: India

Name of company/service: HDFC BANK

Myself Rajesh Moly Rajan and I’m working with International Services, India.

I hold salary account with HDFC Noida, and during an ATM transaction I opted for a Dr card upgrade. Till date I haven’t got the new card from HDFC and without verifying the delivery status my existing Dr card got blocked/ hot-listed. Now I’m not able to do any ATM/ Online transaction with the existing card and also after raising multiple complaints I’m not getting a resolution for this issue from the HDFC support team.

1. How could thy block a card immediately after despatching the new one?
2. How could they ensure that the actual customer received the card that you have delivered through third party courier service?

Regards,
Rajesh. M. R