tune up plus the customer representative lied and discriminated against me because i am a women virginia beach, Virginia

I went to Tune Up Plus on Saturday October 29th at about 7:30 am.  i asked the customer representative if he could tell me what was wrong with my car because i was not getting any heat. he recommended that i do a diagnostic test which would cost 85.00 dollars and he would be able to tell me what was wrong.  I asked him 3 times before i paid him if he would be able to tell me whats wrong, he assured me once he ran the test he would be able to tell me. After I paid him he came back and said he he could not get a complete diagnosis because of the kind of car i have but could give me a list of things to start with to solve the problem, but before i paid him he was sure he could tell me what was wrong.

He gave me a invoice with a estimate of $469.95, for thermostat, gasket,coolant service and upper and lower hoses.( i had just had my gasket and thermostate replaced on October 3rd, but i did not tell him because i wanted to see if he was going to be honest about the repairs.) So i left and when i went home, what had just happended didn't sit right with me.  On monday October 31st i went back with my neighbor because i was not satisfied with what he did. The same customer representative was there and we spoke to him about what happened. i asked him why he recommended the thermostat & gasket when i just replaced it and he said "maybe the person who replaced it put it on wrong."

I asked to speak with his manager and he called his manager Steve and i was able to speak to him on the phone. he said he was on his way from Williamsburg and he would be there that night so he would call me in the morning. He  also said both of them would be there to disuss the situation.  The Manager Steve never called me, so Wed Nov 2nd i went back and i also brought the mechanic who replaced my thermostat & gasket with me. The same cust rep was there again so i asked him if the manager was there and he said no, the mechanic i brought back to the store with me asked the rep why did he tell me the thermostat was on wrong when he knows that if he would have put it on wrong the car would have over heated, and he agreed.

the mechanic i brought with me also asked him how could he diagnos a heat problem on a machine?? he could not answer. I asked him to call his manager again and asked him why he has not contacted me yet, he said he has not had a chance. ( but he was there with him the day before.)After i brought the mechanic who had knowledge about cars with me the representative changed his story and said he didnt tell me he could tell me whats wrong with my car and he also said he never said he could diagnos my car ,but he could take a look at it.  It is now Nov 7th and the manager has yet to call me to solve this problem.