If I block the card, or I get blocked by a bank issuer, can i use the card after that

If the card is blocked, it is only blocked as a payment instrument. The ability to manage money will remain. You will be able to issue a new card if the old one was blocked for some reason by you or the issuer, and use all standard operations with the account, including transfers and a number of non-cash payments.

The account can be blocked only if the user agreement and / or the terms of the contract are violated. To do this, the cause of the infringement on your part should be extremely weighty for example: financing of terrorism.