Picked up my vehicle and the problem is still ther...

Picked up my vehicle and the problem is still there! Had it for 4 days and still not fixed. I have wasted my time attempting to retrieve the vehicle and was never offered a loaner even though the vehicle was under warranty. All this will be taken into consideration on our next vehicle purchase! Never offered a loaner! Why is it that the dealer can never recreate the problem?
****Update 22 January 2019 I just got done installing my headlights, I was told by Bridget at Astro Ford (the same time my turbo was being replaced under warranty at 50k miles or so) that it would be about $181 to change my passenger side bulb because the battery has to be removed and since it has corrosion on it that it costs more! Well I challenge anyone who has time to look up a 2015 Expedition headlight replacement, it is 2 bolts per side it literally took me 20 minutes to change all 4! I will never go back to Astro and it is truly unfortunate because as I have stated to other people that Brian may be their saving grace but not with his two service writers now!