Citroen C4 2007 coup heating and a/c controls

[Telbiy]

My heating and a/c control panel stopped working intermittently but now is not working at all. It's not the climate control one just the standard one. There are no a/c or air recirculation lights working it just seems dead. The heated rear window light works though. It it a case of changing the control panel with a second hand one or could it be something else. Any help woul be appreciated thank you