VonDerAu Ford

I bought a 2020 Ford Explorer in Oct 2019. At least once a week, the following sensors go off: Pre-Collision Assist Not Available, Sensor Blocked Front Camera Low Visibility Clean Screen I have brought my car into Vonderau Ford in El Campo 3 times now with still no resolution. I bought my car at BlueBonnet Ford in New Braunfels but they are 2.5 hours away from me so I cannot use their service dept. I went by their service dept and they told me they would just replace the sensor. So, I went to Vonderau and told them about the resolution. I had an appointment with Vonderau today for them just to tell me they have to order the sensor. Why didn't they order the sensor and then call me for an appointment to replace it. I have been there 3 times now with nothing being accomplished. I feel like I am getting the run-around.