Ensure the bank has your current mobile number so you don't miss verification texts.
Here is a comprehensive guide on why your card might be frozen and the exact steps to get it working again. Why Your Credit Card Was Blocked my credit card is blocked how to unblock
This is a comprehensive guide on how to unblock a blocked credit card. Because there are several reasons why a card might be blocked, the solution depends on the specific cause. Ensure the bank has your current mobile number