Including the Linked Account ID in your troubleshooting request can drastically reduce your time to resolution.
How to find your Linked Account ID:
From your Merge Dashboard, click into Linked Accounts
Find the account you are having issues with (there are two tabs, one for Production accounts & one for Test Linked Accounts), click into the account
The Linked Account ID will be available in a grey box on the right side of the page
The URL of the page will also include the Linked Account ID!
In this example, the Linked Account ID is: 15a56fb2-6efd-4fb6-a63b-f1ee3a4895e1