A regular automatic transmission and a CVT automatic transmission are completely different in how they work mechanically. Therefore the fluids required is completely different too. A regular auto transmission is basically a hydralic pump with some gears and “bands”. A CVT uses concentric “cones” with either a belt or chain between them that changes ratios due to speed and centrifical forces.
The improper fluid “killed” the CVT transmission, no doubt about that. A used CVT replacement at the expense of the repair shop is due here, if you can get it. If you want a new or “factory rebuilt” CVT you might have to put some of your own money into the settlement. A new (or factory rebuilt) CVT would likely last longer since the condition of the used CVT is an “unknown”.
If you get a used CVT, I 'd trade the car in shortly after the repair is successfully completed. If you get a new or rebuilt CVT and you like the car then you should be fine for many more years if you keep the car.