Your Evey subscription billing is managed by Shopify, not inside the Evey app. Because of this, your billing details are located in your Shopify admin.
How to view your Evey billing date
Log in to your Shopify Admin
Go to Settings
Click Plan
Select Subscriptions
Here you will see:
Your active app subscriptions
The billing amount
The next billing date
This is where Shopify shows when your Evey subscription will renew.