Business ProfileforAAMCO of Kennewick WA

I have a **** Winnebago Brave motorhome that I had the transmission successfully serviced at AAMCO of Kennewick WA for a cost of $316.00 on 06-21-2023. When that was done, I also had a nonfunctional temperature gauge that needed fixed, and I scheduled a service call to have the sending unit replaced two (2) days later. When they replaced the sensor, a "check engine soon" light came on, and they told me they would need to find a different "port" for the sensor and replace the dash temp. gauge with an after-************, and I agreed with that. At that point, I left without a functional temp. gauge on 06-23-2023 at a cost of $360.00, and we set a 07-06-2023 to do the actual work for a functional gauge installed. When I arrived at my 1 pm appointment, I saw that the shop was quite busy, with the parking lot full and five clipboards with keys on the scheduler's desk. When the scheduler looked up my name, he told me a mechanic would check to see if there was a "port" they could use, but I wouldn't get a gauge installed this day. This was my second trip to this shop for something I had already paid $360.00, and now they wanted to schedule me for trip three. What did they do when they changed the sensor; did they not already know if they would be able to repair the problem, have the part ready, and affect the repair? I feel like I'm getting the runaround because they overbooked on this day, and I paid $360.00 for something that still doesn't work. What I want is for them to get whatever parts and gauge they need on hand, fix the problem, and send me on my way. I wouldn't mind a modest additional fee to have them finish the job, but $360.00 should have already covered the repair cost. Barring that, if they are unwilling to fix the problem, I want some of the money I already paid, minus the cost of the part, of course, reimbursed, and I'll go somewhere else to have the work done.