i paid for a game with the wrong credit card and want a refund

If it's been less than 7 days/ less than 24 hours since playing the game for the first time, you can request a refund through the great game Guarantee: https://www.origin.com/en-de/great-game-guarantee

If not, please contact a game advisor

Game advisors can be found through live chat or call-back

1. https://help.ea.com/en/contact-us/ 
2. Click on the orange NEXT button
3. Select a platform
4. Click on the orange NEXT button
5. Select a topic and describe your problem in a few words
6. Click on the orange NEXT button
7. Click Chat Now to chat with a Game Advisor or leave your phone number for a call-back
   

In Details here: How to contact a Game Advisor using the new EA Help page