Purchased a windshield warranty, cost $495. It is supposed to help prevent windshield ships and cracks. IT States cracks up to 6 inches long. We got a crack while taveling, by the time we got to a city the crack had gone from 1 inch to 15 inches. The company says no warranty. What is the difference between a on four or 10 inch crack. The whindshield is cracked. Ripoff