Once the app is opened, enter your user ID and password and then tap on Log In.
Tap on your credit card account.
You will see several icons at the bottom and at the very bottom right corner of the screen, you will see a More icon with three dots.
Tap on the More icon.
Under security, you will see an option which says Freeze Account.
Tap on Freeze Account.
On this screen, you can read what happens when you freeze your account. If you are okay with that, go ahead and tap on Freeze Account to freeze your account.
Once you do that, you will see a message which says your account has been temporarily frozen.
If you would like to unfreeze your account at any point of time, you can come back on the screen and tap on Unfreeze Account.