Check your cards with the chess.com method.
Create a free chess account and sign up for the premium subscription. If it goes through your card is valid. If not try a new vendor/new cards.
Ensure your setup is good.
https://carder.market/threads/20-se...ingerprint-webrtc-canvas-ip-webgl-etc.150170/ -check setup.
Please answer the following questions so I can help further.
Do you use an anti detect browser? What’s your current setup?
What websites are you trying to card?
What proxy and vpn are you using?
Are you creating email accounts under the cardholders name?
Have you ensured the cards are non vbv?