Just a heads up that I can confirm success using the online 90 day reporting system for the Kanchanaburi Immigration Office. My application stayed on 'pending' for a week, but a quick phone call and it was changed to 'approved' the same day. (Note I use Safari on a MacBook Air).
TLDR : Answer Summary
The user confirms successful use of the online 90-day reporting system for the Kanchanaburi Immigration Office, noting some initial delays but quick resolution via phone. Comments reflect on the broader implications of this system's functionality across different regions and its compatibility with various web browsers.