NBA League Pass Problems

so i got the free trial NBA League Pass subscription on my Apple IPhone 13, and i canceled it and it charged me again for $14.99 even though I canceled. I canceled the new NBA subscription and called my bank and they said they couldn't do anything about it. So i canceled the new subscription and they are charging me again for no reason and my debit card has 5 bucks on it so i am scared to put money on thinking they will charge my account. So that is why i'm here talking about my problem hoping that apple can step up and help me from this unfair battel against NBA League Pass.