Bad customer care from Service Department regarding radio replacement.

I bought my Mahindra KUV in 2020. That was an amazing experience, no problems whatsoever. In 2022 my car's radio screen went blank and during my 10 000km service this was reported and replaced in July/August 2022 by their third party supplier. The supplier couldn't find a radio that matched but eventually did. During my 20 000km service I reported that the radio closed and won't open. The radio should have a 1-year warranty on it, which means it is still replaceable after they replaced it in 2022. This has been over a month ago and I have been receiving the run around. First my service records can't be found and I got asked if I have always brought my vehicle to them, then they found it after searching again. Regardless of following-up weekly, calling and checking Mahindra does not get back to me. I left an email on their website - no response. Spoke to their Service Manager twice now, no feedback. All I receive is excuses and no customer service. I actually asked the Service Manager on Monday 6 March to call the owner of the supplier they use, and not the manager. I requested feedback by the end of the week, which is tomorrow but still nothing. This is the worst service I have ever experienced from a company. The third party supplier has personal information such as car VIN numbers, contact details etc. but cannot find my records and insists that it is the original radio in my car. Now we are also looking at POPIA what are they doing with my personal info if they cannot find a record of my car on their systems with the radio supplier. I expect better service than this from a company promoting themselves as a company that goes the extra mile. I am also still waiting on feedback on my air con pump that needs to be replaced, last feedback was it was ordered and I had to call and ask for information. This is the worst service I have experienced in a long time.