Nissan Xtrail 2015 All Mode 4x4 2.5L delayed takeoffs after stop and goes then after a while Rpm goes up but no power stops changing gears from a stop

Question

Nissan Xtrail 2015 All Mode 4x4 2.5L petrol CVT automatic transmission, Rpm going up but no power. After driving for a while in town mainly(stop and goes) the first sign of the problem it starts to have delayed takeoffs from stops only then after a while of driving from a stop it goes up to 20-30km/hr speed won't go beyond that, I tried putting it in tiptronic but no change in speed with down shifts or up shifts, it only counts up to the 4th gear when I up shift but no change in speed or sign of gear change. If I stop and start it drives just fine. Changed transmission fluid but no change