Subscription linked to another account
A Google Play subscription attaches to the first JustCoffee login that redeems it.
A Google Play subscription belongs to the Google account on the device, and it attaches to the first JustCoffee login that redeems it.
If the app says the subscription is linked to another account, sign in with that JustCoffee account. If you cannot, contact us from the email address you used to pay and we will move it over.