Hi there Ghea,
Thanks for reaching out to Apple Support Communities. We understand you need some help with a subscription and billing error. We’re here for you. Let’s get to work on getting those resolved.
To manage you subscriptions follow this guide: How to cancel a subscription from Apple. For details on what to expect, scroll to the bottom of the page and check out the “About canceling subscriptions from Apple” section.
In some cases, payments can be refunded. To submit a request, follow this guide: Request a refund for apps or content that you bought from Apple. We hope this helps.
Best regards.