Unauthorized Transaction in my Gcash account and Apple Services

I purchased Php 49 for additional gb on my icloud and linked my gcash account to my icloud for future payments. My first payment had my permission and consent. Apple Services deducted again last week Php 49 TWICE in my Gcash account without my permission. I did not complain. Apple Services deducted again last night Php 499 for renewal of my subscription which I have already turned off long time ago. Again, they deducted with my permission in my gcash account. This is unauthorized transaction. I checked the apple account and there is only 1 transaction made, that is my first payment. One thing, Apple is sending billing statement on my iCloud email for my reference but the last transactions had no billing statement.