Car and calendar

I'm trying not to rant. My car has a stupid electrical glitch. The dealership (various people, once each) has been assuming I just don't know how to run the car, have maybe pushed buttons accidentally, can't read the labels or don't realize that most of the buttons are toggles ...

They kept the car for a week, acceded to my request for a loaner -- a rental which, in the end, I actually paid NOTHING for. They weren't able to reproduce the issue.

Finally the service manager told me to bring it back in the next time that display lit up, and don't shut it off, so they can read the codes. So it happened at 4 pm when I was an hour away, but no point in bringing it over at 5 because everyone goes home. It happened on the weekend but the service department's not open.

Finally on Monday it happened. I brought it in, after arguing with the receptionist who clearly saw her job as defending the sacrosanct service schedule from greedy entitled people trying to jump the line. They read the code. The code said "electrical" but nothing else.

Great! We knew that. How could it be anything BUT electrical? So what this tells me is that they thought I was just a silly old lady complaining about nothing.

Except that the user group at [car model] dotcom has been talking about EXACTLY this issue for over a year. And it was a problem in the previous model year, too. So what is the manufacturer doing about it? Why is every dealership treating their customer as though it's something they never heard of before, or something that couldn't be happening?

And what's with the morning's service writer ("Jay", who I hadn't met before) say this is a "diag" issue, like I would recognize that abbreviation?

So yes, I'm ranting. I've been here 3 hours and 45 minutes without an update. They warned me diagnosis could take all day.