Toyota Corolla 2011 Model Auto Transmission RPM / Accelerating problem

I have Toyota Corolla 2011 model. When i accelerate the car from 35 to 60 KPH, the RPM increase a sudden and remains 2000 and above (it’s not normal as before) but car doesn’t accelerate. When i increase acceleration it goes around 3000 RPM then shift to next gear and RPM comes down. Every time when car have to shift to next gear it doesn’t shift normally, only RPM getting increased and doesn’t accelerate normally.