I wanted to get your thoughts on something that happened recently.

I went to a transmission shop and asked them to do a partial fluid change on my 2012 Scion iQ (55,000mil). I even showed them the exact fluid the car requires Toyota CVT Fluid FE. But they ended up filling it with ATF instead of CVT fluid. When I found out, they admitted the mistake and said they would fix it by doing a double flush with the correct OEM Toyota CVT Fluid FE and refill it properly. I drove about 4 miles with ATF before they started the flush.

My question is after this full procedure, will my CVT be safe and work normally, or could this mistake have caused permanent damage?

Id really appreciate your professional opinion!