Route 46 Chrysler Jeep Dodge Ram

I brought my car in because my accelerator got stuck which almost caused me to get into an accident and the advisor Juan Hernandez said that I need to get a trans flush, oil change, and fuel injection. Juan also stated that if I don't get the trans flush my car accelerator will keep getting stuck. All together I would have had to pay $550.. I drive a 2013 chrystler 300c AWD with 31,400 miles. My car is still under warrantee. Why would I have to pay for something that may be a recall or possibly get me into a accident... Safety is suppose to be first.