AutoNation – Recall repairs to a 2014 Ford F 150 pick up.

I took my 2014 Ford F 150 because I received a recall notice. The customer service rep told me that my vehicle also needed new tires. They made the recall repairs and replaced the tires. now, the windshield wipers do not work. they were working fine before their repairs. They want to charge me $150 for a diagnostic test to determine why the wipers are not working. They caused the problem and they want me to pay to see what they did wrong. I bought 4 vehicles from this company but I will not buy another one from them