This is how you connect to a Facebook page and launch your bot:
To disconnect your bot from one Facebook page and reconnect it to another, follow these instructions:
1. Navigate to Settings in the top navbar
2. Select Bot Settings below the top navbar
3. Click Unpublish > OK
4. Click Disconnect > OK
5. Click Connect to Facebook
6. Select the different page
7. Click Turn on Abandoned Cart Messages
On a side note :
If your page is not visible in the list of pages you are trying to connect your bot to, then from your facebook account, go to Business integrations.
Then open the Octane AI and chose to open and edit, under pages you will find all the created pages on your account. Just make sure the checkbox for the page you want connected.
Save the pages and try to reconnect, it should work.