Car Will Not Accelerate problems of the 2017 Toyota RAV4

The transmission, is not shifting properly in even mildly cold weather. Had the car for two years, and now the tranmission, is not shifting properly when you first start it up. The engine rpms are at 3,500, when doing 30 mph down the road,and pushing all the way down on the accelerator, the car will not go, there are no error lights, there is an tranmission shift issue with acceleration issue. This is dangerous because when going down a 35 mph road, there are cars that can accelerate and this car goes nowhere. Start the car after being parked outside in cold weather, waited 5 minutes before driving the car, and it is still not responding properly. There have been electrical issues with this car, and now the transmission will not shift and go into gear properly, not sure if its the computer program, or gear issue. Never had this problem until the second year of ownership. Owned the car since it was brand new. This is a safety issue, with the car not being able to go the proper speed limit, and the dealer is trying to say OH, it takes a while for the car to warm up, did not have that problem last winter being left out all day and night. There is an electronic control module for the transmission, and the gears this is a safety issue that Toyota needs to address, the car will not even accelerate properly because of this transmission issue and if you do accelerate you can end up ruinning the engine.