You can find your next billing date on the Subscription page in Storrito. This is the date when your next subscription fee will be charged.

On your billing date, Storrito automatically charges your payment method for the amount you've set as your subscription. Your wallet is then topped up with the corresponding credits.
If your payment fails, your subscription moves to a past-due state — see Past Due Subscriptions for troubleshooting.
After each successful charge, your invoice is available under the Subscription view. Click Invoices to see your billing history or download individual invoices.