Apple Service Payment Automatically

why my account is automatically paying for apple service? and when i try to cancel the payment, it said that unable to remove cus theres an active subscription, and the apple ID is only me who used it. and how can i know how much i need to pay next? and for what? i didn’t use apple tv, music or something that connected to apple apps. like it’s suddenly paying to apple service without my concern. I NEED TO KNOW IF THERE IS A PAYMENT I NEED TO FINISH, THEN WHAT IS IT ABOUT? OR HOW MORE MONEY I NEED TO PAY? thanks.