Visa card not accepted ("can't perform transactions to this credit card")

Hello. When trying to add Cartel Coins in game, I get a "Requesting data" pop-up with an error message: "An error occured while processing your request. Please try again later. Error Code: 10"

Trying again later didn't help.

Logged in on the SWTOR site and went in my account to Cartel Coins. I had "Purchasing of Cartel Coins from the in-game Cartel Market" enabled, disabled it so I could enter my new Visa card. Clicked" "Enable". There was still a previous credit card listed there that I since then removed. There was no option there to add a new card. Clicked on Subscription, then at the bottom on Payment History. There I finally saw Credit Card Accounts. There's no credit card listed there, since I removed it, so I don't know why that old credit card is still listed under Cartel Coins. Clicked on "Add a new credit card", Fill in the information, then get an error message "We're sorry, but we can't perform transactions to this credit card. Please load a different one."

My card is Visa Business Credit.