Tado extension kit - de-registering
I bought a tado extension kit second hand, which I now want to install. I have been unable to register/activate it because it hasn't been deregistered by the previous owner, who is not responding to my communications. Is there anything at all I can do or is this just now e-waste? It would be such a shame if that's the case as it seems like perfectly good hardware has to be thrown away because it can't be reset!
Thanks for any assistance,