You can raise an Issue in Moon Invoice easily by following the steps below. 

1. Open the Moon Invoice application on your device or tap on this link.
2. From the main menu on your left-hand side, navigate to Get Help.
3. Select the issue you want to raise and fill in the required details, including the subject, issue type, and description. You can also add an attachment to the issue.
4. Click on Send to raise the issue.

Note:

You can also use the 'Chat with Us' feature to connect with a live agent and report any issues you're experiencing.