HDFC Bank — Blocked my account due to undelivered of Welcome letter

I have opened the salary account with HDFC BANK one month back. I visited the bank for physical documents submission and i submitted everything, they told your passbook, Debit card & cheque book will deliver to present address. In between they did physical verification of my present location. After one week i received message from bank, that your welcome kit will be delivered and received tracking number. After three days i received. On Tuesday i received message Welcome letter is undelivered due that your account is blocked. I haven't received any tracking number or any message from bank for tracking Welcome letter. Due to this my salary is blocked. Without my concern they have blocked my account. I have to pay all expenses and bills. Please resolve my issue. If take any strictly action others will not this kind of issues. This clearly there fault.