Audi The Glen

My car started experiencing battery issues which led to it displaying a number of errors on the dashboard screen. I then booked it in at Audi The Glen for a check, to which they confirmed the battery is faulty. I was told they would charge the battery for me and this would take 8 to 9 hours and therefore I must collect my car in the morning. Come the next day, I'm told the battery couldn't charge because it is overly drained. So the next step is to change it, but now the issue is I can't claim from my motor plan since the diagnostic test is showing that I left the lights on on the car so I'd have to pay out of my own pocket. I was very dissatisfied by this outcome since I believe my motor plan should cover me in situations like those. I then called Audi SA to expressed my dissatisfaction and spoke to Earl. He promised to get back to me within 24 hours. Two days went by and he called me on the 3rd day which I missed his call and called him back. He then told me the same thing. I am extremely disappointed by how this matter was handled to an extent that I do not think I'll continue having a relationship with Audi.