Paid AskNebula Once for Horoscope, Now Being Charged Monthly Without Consent

AskNebula.com has withdrawn money from my account without my permission, and I’m unable to cancel the subscription. I don’t know how to resolve this. A few days ago, I used the site to view my birth chart, and it requested a small one-time payment, which I paid by card. Other than that, I never subscribed to anything.

Now, AskNebula is charging my card again, even though I never authorized it. I urgently need help canceling this unwanted subscription and getting a refund for the unauthorized charges.