Hello - Sorry you are having problems. First, have you confirmed that the device itself is configured properly (through the Shelly mobile app) for each of the channels? e.g.:
- Operation mode = Relay
- Power On Default = SWITCH
- Button Type = Toggle Switch
Also, go into “I/O Actions” under Settings in the Shelly mobile app and confirm that for both the Button on and Button off URLs that they are Enabled and that you see a URL there for each containing your hub IP address. This is how the device notifies the Edge driver of button state changes. Be sure not to accidently change the URLs here.
If all of that looks OK, then the next step will require that you have the SmartThings CLI so we can see what the logs are telling us.