If you billing provider is Shopify, you can check your billing information on your Shopify account. On your Shopify admin, go to Settings > Billing, and click View all subscriptions.
Otherwise, you can check your Billing information through the console.
Hover over the left menu > click on the three dots next to your name > select Billing.
You can also see your session count for the current billing cycle there. Additionally, you can upgrade your plan there. Check out the article here.