Google Nest Community

Google Support Chromecast line is 1-844-400-2278 

In which country do you bought and use Google Services? Model of device and issue, I will be happy to help you here and tell you the way to contact Google support if you tell me your country:)

Google provide you support Via web at the link Patrice58 posted and via phone and chat, customer care numbers depends in which nation are you.

Google Chromecast remote powers on and off the connected receiver either using CEC or IR blaster. It powers on and off the TV using IR blaster but not the CEC. Chromecast only offers the option to map the power button to CEC, receiver (CEC), receiver...