20 days in Turkey, drove over 4000 km in a counter-clockwise direction, driving conditions were exce

I needed to rent a car for 20 days, but on the second day of use, the car's display indicated a lack of windshield washer fluid, so I had to buy a bottle and refill it. On the third day, the vehicle indicated maintenance was needed in 300 km. Because the display was in Turkish, it seriously affected my usage. The rental company's customer service told me that for diesel cars, it might need AD Blue or engine oil, and I should add it myself. However, they did not inform me beforehand who would cover the cost or what brand of AD Blue and engine oil to use. I found a Shell gas station and asked the staff to check, and they said the message was not for adding AD Blue. This caused a whole day of worry about using the car improperly and potentially damaging it.