Hi @Emo_Hobo and welcome to the Spotify Community.
To remove your card you have to log in at spotify.com and go to the Account page. Click on "Manage subscriptions and payment" and then "Change payment method or card details" or directly click on the link.
At that point you can remove your creditcard or change your payment method.
If you have any questions, feel free to ask.
Hi, can you attach a screenshot so I can try to help you more?
To be sure you are not an active subscriber, go to your account at the Spotify website, and click "Manage subscriptions and payment" and then "View your options" at the "Cancel your subscription" part
Can you try this link: https://www.spotify.com/us/account/subscription/change-payment/ probably you'll get an option to remove your credit card.If not, I think contacting Spotify is the best way, you can do that by following this link https://www.spotify.com/us/about-us/contact/contact-spotify-support/