Whoever you talked to is either a theif, don't know what they are doing, or don't know anything about ordering parts. Not many other categories they could fit into. If you can't trust them on a quote, I would be wary of them coming within 3ft of my car. go back in and tell that mother****** that if he EVER tries to lie to you to again he will not see another customer come in for three years. Watch godfather a couple times for examples if needed.
but seriously. What a loser. be like.. " uhh. can you itemize this for me please. Where are you coming up with your numbers, your hourly rate, parts prices, because 4k is not possible for this job. Like, i really can't figure out how you are even coming CLOSE to this. Quotes are part of a business too. I will give a bad review on a quote ALL day. need to hold people accountable. Especially mechanics.