Hi can anyone help me please??

I have tried to install and operate 4 KE100 smart radiator thermostats. They are all logged into the hub, not none of them operate at all. The heating can come on and you switch the rad off via the app, still nothing. Rad still heats up as if non smart thermostat fitted. Also tried calibration many times. The unit fitted directly into M30 thread so no need for adapter.

also the unit will not regulate the temperature as set via the app, just keeps rising. Set to 20 but rads will read out at 24 degrees. It's almost the pin on the trv is not making contact with the KE100 itself. I have tried the sleep mode also many times. 
 

scratching my head here!!! Please help if you can?