Best Tile Removal in Phoenix AZ

This company reneged on a signed estimate for a job in Tucson at a residence I own. The estimator looking at the job said the cost would be more given the added travel time from Tempe which I accepted. After I received the estimate, I sent in a 60% required deposit and signed estimate. They called to say the original estimate was no longer valid, and the cost would be substantially more because of the travel time. The estimate would now be 2 to 3 times what the original estimate was. I don't see how this in any  way calculates for a distance of an hour and a half driving distance, especially since I was told that the original estimate already accounted for that. This is a breach of contract, an unethical business practice, and a big waste of my time.