Accurate Transmissions & Auto Centre

My experience with Accurate Transmissions was very frustrating.
At first they came across as very helpful and knowledgeable, so (despite some of the negative reviews on here and Google) I decided to take my car there.
Originally I was told that since the problem with my car was intermittent that I should expect it to be in the shop overnight for diagnostics. This was acceptable, but my car ended up being with them for over a week and a half with no diagnosis and no expected timeline for repair.
I dropped it off on a Monday, so I was expecting to hear back on Tuesday. However late in the day on Tuesday I still hadn’t heard from them and decided to call. Once I called they told me that they hadn’t even looked at my car because they were waiting to get «troublesome» vehicle out of the shop and would be getting to my car later that day or early the next.
I didn’t hear from them all of Wednesday and called on Thursday morning trying to get answers. I was told that my car was a «special case» (but not why my car was a «special case») and they were waiting for the owner to get out of a meeting and he would call me soon. Well, that never happened.
I called again on Friday and they told me the road tests were not turning up any results and they needed to do manual tests on the car, which would happen either that afternoon or early the following week. Monday was a holiday, so I gave them all of Tuesday the following week to sort things out. When I called Wednesday morning (the 10^th day of me being car-​less and the 7^th business day of them having the car), and the office manager informed me that all they had done the day before was «move my car out of the shop» because things had been «busy» and she was hoping to have answers for me late in the day. I’m sure you can anticipate what’s coming next… they never called me back.
This bring us to Thursday morning (11^th day of me being car-​less and 8^th working day for them). I called and was told they would check on my car and «call me back soon.» They never did, so I called repeatedly in the afternoon until someone picked up. I was told that they weren’t getting any results with the road tests and hadn’t felt the symptoms (even though I was told the week before that they had felt the problem I described) and wanted to keep the car for another day to continue testing. Also, apparently they never did the manual tests they promised, and throughout the 11 days I had been given many conflicting stories about my car. They also never initiated the contact during the entire duration of my car being in their care, which is ridiculous.
I was at my wits end and told them no, I wasn’t going to leave my car with them for ANOTHER day. I went and picked it up that afternoon. When I arrived I was told that I should just continue to drive the car and make the problem worse, since they weren’t able to isolate the problem. Ironic, because halfway through my drive home the problem acted up again.
They didn’t charge me anything, which I appreciate, so all I lost during this process was time and sanity.

Terrible customer service. I would never deal with this company again. Accurate transmission was extremely unhelpful. I wish there an option to give zero stars because that is what they deserve.