although im not purchasing anything from my debit card but its deducting my money

I’m not deducting anything. This is a user to user forum, we don’t know who you are or anything about your account. But you can easily find out what you are being charged for if it is a recurring subscription by following the instructions in this link—>See or cancel your subscriptions - Apple Support.

And you can see all of your purchases using this link—>See your purchase history for the App Store or iTunes Store - Apple Support