You can change your payment information in the profile settings.
Please follow this guide:
1. Open the Arkadium website.
2. Click Sign In.
3. Enter through your Google or Facebook account, or enter through your e-mail, click Continue and then enter your Password in the next window.
4. Click your Profile picture at the top right corner and in My Profile.
5. Select Arkadium Plus tab.
6. You can click on Manage Subscription, on the green icon in the center.
7. Click Edit.
