Speed Sensor problems of the 2013 Kia Motor Sorento

There was a recall in 2017 for the speed sensor on the rear wheels. The sensors failed repeatedly and kia, on the recall just sprayed silicone on the electrical connections. The sensors continued to fail and all the lights on the dashboard continued to stay on. After the so called recall fix, I paid $326. 00 twice for the left rear sensor, and $326. 00 for the right rear. However, kia is not placing anything on the electrical connection to further prevent the failure of the sensors. In August 2020, I paid kia to replace the sensor on the rear and did not drive the vehicle until January 28, 2021. Upon starting the vehicle, the lights stayed on which the dealer states that the sensor was bad. I explained that the vehicle has not been driven since it was replaced in August 2020. Again, I had to pay to have it replaced as the dealer said. When I picked up the car, I asked for the old part, and was told they threw it away. The service advisor refused to look into the trash to find the old part. I called kia headquarters to make a complaint and was told that their system was down and they could not take my complaint. I cannot continue to pay kia money to keep replacing the sensor, of which I cannot access, and they know that it is a defect. I have spent over $1200 since the recall was first issued on the same problem. There should be a permanent fix to this. These wires are underneath the car and exposed to water from rain on the streets as you are driving. Why kia do not find a way to cover the electrical wiring is what I think should be done, and not have me to pay $300 everytime it fails. The recall fix is not working.