Freezing and locking are two different states:
Freezing is something you do manually in the DPT app. You can freeze your card at any time to temporarily stop all transactions. You can unfreeze it whenever you want.
Locking is triggered automatically by the system when you enter your CVV, expiry date, or PIN incorrectly 3 times. The lock lasts for 24 hours and then lifts automatically. No action is needed on your part.
In both cases, no transactions will be processed while the card is frozen or locked.