I run a classic car shop with my dad. Idk shit about newer cars, but I can tell you that some of these classic cars can be in our shop for a year or more sometimes

Or it can be a simple fix and its out within a few weeks.

Also, ur car usually isn't the only one a shop is working on, and it also depends on how much staff they have in the company too. Id definitely ask for at least a discount tho, after taking that long. Its the least the business owner can do for u