DO NOT use their service department!! Twice I too...

DO NOT use their service department!! Twice I took my vehicle that had an intermittent problem. Twice they refused to even check anything on my vehicle because they couldn't duplicate the issue. I completely get they need to replicate it. My complaint goes beyond that. I gave a very specific description. The first time I took it, they had it for two full days without any updates to us (our mistake for not checking in with them. I thought they were repairing the vehicle). At 4 pm on the second day, we called for an update and they told us they couldn't duplicate it so to come get it. So for two days, they drove it a couple of times and checked nothing. The second time, we drop it off at 8am and at 4 pm we're told the same thing...they couldn't duplicate the issue. But this time, the service adviser "forgot" to tell the technician (who was now gone for the day) my detailed description of the issue. When we went to get the vehicle, my husband asked for something in writing, signed. that said they couldn't find anything wrong with the vehicle. The manager refused to provide anything signed. When my husband asked why he wouldn't sign it, he finally snatched the paper out of my husband's hand, ripping the paper, and tried to scribble something on it. At that point he left. Twice now I feel like they made no real attempt to find a problem with the vehicle. We offered to leave it longer for them to actually look at it. No. We offered to pay for a detailed inspection. No. They just wanted us out of there. I have never before felt like I did not matter as a customer at all. It was awful.
***UPDATE: Took to Autonation Ford in Katy. Although they also could not replicate the sound (which we were not surprised about), they still looked at the vehicle based on my description. They isolated what they thought was causing the issue, and actually offered a solution. Thank goodness for someone that listens to customers!