Citroen DS3 radio problems

[TOPCAT50]

I have a Citroen DS3 which is a 2018 model. I have problems with the radio.
The radio does not come thru the speakers and neither does the calls when connected to Bluetooth. I have tried the radio as dab, fm and am. Every so often the radio will work but once you stop car it disappears again. The display works and when you try to change channels it makes a noise as if something is working. When a call comes in it appears on the dial and the radio will come on as the call rings! But you can't speak thru the Bluetooth in the car. Radio/calls don't work either with the phone plugged in and Apple car play selected. Occasionally the radio will come on really loud and you are unable to adjust the volume. Also twice now I have stopped the car and the radio will not go off.

[GiveMeABreak]

Have you got any aftermarket equipment connected to the wiring, made any modifications or spliced any of the electrical wires?

[TOPCAT50]

No nothing at all.

[GiveMeABreak]

Sounds like a Head Unit issue. You may want to try and factory reset it if you can access that from the settings menu. It will lose all the customisation, but may just sort it. If not, it really will need a diagnostic to ascertain the problem. Being a 2018 DS model I suspect you have the DS Connected Nav system, so will need a later version of Diagbox V9.5* or later, or pay a dealer for a diagnostic.