Front Air Bag Sensor Control problems of the 2012 Dodge Journey

6 weeks ago the airbag sensor light appeared in my car. I called the local dealership (lafontaine in lansing, mi) and they took a look at it. They discovered the wiring between the sensor and the airbag had corroded. In September 26, 2017, our car's heater core exploded on us after being installed improperly earlier in 2017 by wysup Chrysler in pullman, washington. It poured boiling hot water and antifreeze on my husband while he was driving the car. We believe that this was the cause of the corroded wiring, but Dodge refuses to fix it. We have been without a car for over a month now as we sit and wait to see if Dodge corporate, the bbb, or the attorney general's office of washington state will help us. The cost to fix our airbag sensor is $1500.