Citroen DS3 buttons and audio not working

[Zara7865432]

The source and audio buttons on My 2012 Citroen DS3 have suddenly stopped working. Whenever I press ‘source’ or any of the radio buttons there is no response on my screen. They were working perfectly fine 2 days ago, but now it’s not working. Unsure on what to do any help is apprecaited

[GiveMeABreak]

Are these the buttons on the actual radio itself or on the radio remote stalk on the steering wheel? Please be specific.