If you want to stop a channel importing your orders but also want to keep that channels order history you can then just disable the channel.

This stops any orders importing but retains your channels order history.

1. First of all hover over Settings a click Stores

2. Then click the store you want to disable and from the opened options click the Disable button.

3. This will then load up a page where you just need to confirm things by clicking the Disable this store button.

4. There you have it your store is now disabled and will no longer import orders, if you need to change this simply just follow the on screen prompts.