2016 Citroen DS3 whole centre screen keeps shutting off, every 2 mins, then turns itself back on but volume is low.

This has been happening now for nearly 18 months. I asked the dealer who sold me the car to identify the issue the last time it had a service. They did not, so thank you Lookers of Kirkstall Road Leeds for fobbing us off with...."we are not Citroen Dealers".
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I have rung Citroen and they say it is 98% likely that its a software issue and to book it in, which I have done for Friday 23 Oct 2021. However, I intend to call them before I take it in as I am not paying for a Remote Diagnostic check, I want Citreon to acknowledge that this is not a one off issue and a recall would be in the best interest of everyone who has bought a DS3.