I'm ignorant of the actual issue, but if it was my car, I would want to do some research as to what the problem is and why.
If it's something that can be repaired, I'm think the next thing is to find an independent trans shop who's capable, rather than a chain.
Unless of course there's a sharp guy working there, but I've usually found that the best guys are independents.
I'd also look for a good used - maybe the 2014-up version, if it can be swapped in - unit, though the final cost may not be advantageous.
Electronics may prevent that working out, though, as in PCM & etc.
The prices for late-model parts are outrageous; granted, the stuff is complex, but jeez...