Hey @Stacey1994, welcome to the community!
Sounds like you have two Spotify accounts created with your information. Right now, you can only have one payment detail linked to each Spotify account.
I suggest following these steps to see if you can find the log in details for each account. You can cancel the subscription on the account you're not using to stop the duplicate payments.
Let me know how it goes.
“Music acts like a magic key, to which the most tightly closed heart opens.”
― Maria Augusta von Trapp