I wish I had an option to cancel or renew netflix from the app store subscription page or play store subscription page. They can charge me the extra 15%. Now if

I wish I had an option to cancel or renew netflix from the app store subscription page or play store subscription page. They can charge me the extra 15%. Now if i need netflix for a month, I have to open netflix from browser. Click restart membership, select the plan, enter the cvv, then it opens an embedded frame for the bank's website to enter the OneTimePassword from bank(sometimes I get session error here and have to repeat the whole process) to subscribe.