Very Poor Service Delivery

I bought a brand new Ford Ranger D/C in 2018. I have had issues with the radio not playing at intermittend intervals, from the onset.This I have reported with each annual service and subsequently booked the vehicle in for the radio issue, on 3 separate occasions. The problem still persist the biggest issue, besides not being able to resolve a problem over the duration of 6 years, is the lack of communication, feedback and understanding the impact of the issue.Not even the Dealer Principle Wernich Stipp, bothers to respond to any communication it is up to me to drive this at nauseam. This is the worst service I have ever encountered, bearing in mind, this was a not so cheap, new car. I am still awaiting feedback on the way forward, as I speak. They have no focus on customer centricity l not even the basics is adhered too.