Try Buerge (Ber-ghee) In West Los Angeles on Santa Monica Blvd. Talk to Manny Salinas.
I've had good luck there. Tell them Laura with the Black SRT sent you (yes I'm on first name basis now from my limited I HAD).
The guys in service asked if my visit there was pleasant & up to par & that when I get a survey form in the mail asking about my most recent service visit... If I could give them a good review. They explained that the surveys are a big part in keeping their 5 Star status.

Try explaining your frustrations & bad luck at your last 5* & maybe they'll treat your car with kid gloves because they know you'll take your business elsewhere.

My $0.02