Deactivate a fulfillment service
If you no longer want to use a particular fulfillment service, then you need to make sure that their rates aren't offered to your customers at checkout. If your account with the fulfillment service is in good standing, then you can reactivate the service at any time.
To deactivate a fulfillment service:
From your Shopify admin, click Settings, and then click Shipping.
In the Dropshipping and fulfillment section, click Manage services.
Find the fulfillment service you want to remove, and then click Deactivate next to it.
If you don't see a Deactivate button beside the fulfillment service that you want to deactivate, then you can find it on the Apps page in your Shopify admin instead.