Change your payment method on Android
If you purchased your subscription in your Android phone, the payment is processed through Google Play Store. The payment method used is the one you have associated to your Google Pay.
To edit your payment information:
Go to your Google Play Store app
At the top right, tap your profile icon to open the menu
Tap Payments and subscription, then tap Payment Methods
Here is a link from Google Play Help that explains how to add, remove, or edit your payment method on your Android devices: https://support.google.com/googleplay/answer/4646404
You can also check here what payment methods you can use with your Google Pay to buy your Mojo Subscriptions in the Play Store.