is there a way to remotely turn off funamo?
not that I know of, but I'm just another user.
You can use the "Application control options" and others, through the Funamo website, to achieve the same end. In most cases you don't lose detailed settings in the process. So, if you use a daily time allowance, set the time allowed to a high value (and retain the selection of apps with limits). If you use Protect Apps, uncheck that single checkbox, etc.
The techy way ... if your device is not setup correctly, you can. in case adb is switched on, there is a way to connect to adb via WIFI. And via adb you can kill processes. But - as I stated initially, it requires an adb daemon running on the adnroid device, which is strongly NOT recommended, if you run funamo.