For NA support

https://support.na.square-enix.com/c...382&la=1&fty=2
https://support.na.square-enix.com/c...p?id=5382&la=1

It's different if you are in another region.

How to send a report in-game：
1) Select System, then Support Desk > FAQ > GM Service Main Menu
2) Follow the instructions on screen.