Syncee works in cooperation with Shopify.

When you subscribe to one of our plans, you pay the subscription fee to Shopify. As a result, you will be able to access the billing information and your invoices in your Shopify account.

The Shopify user manual will help you to find your invoices and your payment details: https://help.shopify.com/manual/your-account/your-invoice

If you want to cancel your Syncee subscription you can check this article:
How to cancel your subscription?

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