Hello,

I am updating my situation if someone encounter the same issue as me and find this topic.

I reached to Kryterion support as Databricks advise me to. After several attempts to register with my card, calling my bank, and three chats with the Kryterion support team, the only solution appeared to be to try with a different card. In the end I suceeded to register with a different card (and passed my exam). 

Good luck