Both options exist, and which one applies depends on what was selected at checkout.
One-time purchase
A single transaction. You will not be charged again for that order, and you will not receive any automatic shipments.
Subscription (Auto-Ship)
Renews automatically on the schedule chosen at checkout, and is billed before each shipment. This only applies if Auto-Ship was selected when the order was placed.
Some of our products are available either way, so it comes down to what was chosen at the time.
If you are not sure which applies to your order, contact us at support@botaniqueparis.com with your order number and we will confirm it for you. You can also check by logging into your account - see How do I manage my subscription?