Car Service

I took in my car for service, the service consultant assisting me called around midday to give me a quote for all the parts that needed to be replaced. it was around 3,500, so i agreed for them to go ahead and fix my car. later during that day i went to collect my car. she gave me an invoice which had an amount of 6,500, double what she had mentioned on our telephone conversations. I confronted her about it, she said oh yeah we also changed your break pads. I said but we didn't agree on that. she rep**** that well at-least your car is safe now. mind you I didn't budget for that amount, and she couldn't even give me a discount. fine I paid and left the dealership.

The next day she sent an email for me to rate her and included her managers email which i could use to make a complaint if I was not happy with my service. since i was not happy, i wrote to the manager and didn't cc her. To my surprise, I got a response, from the very same person I had complained about. the manager didn't even bother to respond, instead he sent my email to the person I was complaining about and she contacted me to apologies and asked if I may give feedback on how she can improve.

my matter was really handled unprofessionally and I never want to take my car there anymore