CVT is whole different mechanism than an standard automatic transmission. It needs a very different kind of fluid.
Has the transmission failed? Is it still working? Working normally? Or, working but jerky and/or noisey?
Did you find the Valvoline fluid spec cvt ns-II at TK and is that what they put in the transmission? Or, did you find the Valvoline spce cvt ns-II at an auto parts store and you plan to put that in the car now?
The post and answers are confusing. If the trans is working take BladeCutter’s advice. Get is changed by Nissan using Nissan fluid. If you use the Valvoline fluid you are taking a risk. If TK put in a fluid meant for a normal automatic transmission, stop driving the car immediately and get that fluid out of the trans.
If it is too late and the trans is shot, get a new one and always use Nissan’s Fluid. Then take the bill to a lawyer and sue TK if they don’t replace the trans at their expense.