Transmission Not Engage problems of the 2018 Volkswagen Tiguan

From a stop, and at low speed, the vehicle hesitates very badly. At times, with the gas pedal to the floor, the car does not accelerate for 2-3 seconds or more--it just coasts. In other situations, the transmission does not engage at all, and the engine revs to high rpm. This has led to near accidents on multiple occasions: when crossing traffic to make a left-hand turn, merging into traffic after making a right-hand turn, or attempting to get to speed entering a freeway. Further, this is not how the vehicle behaved on the test-drive. If it had, I would never have purchased it. To date, the vehicle has spent more that 3 weeks in the service department of the local vw dealership. After this period of service, the vehicle was returned to me, and I was told that vw had determined that this is a "feature of the vehicle", and that nothing more would be done to address the problem. This is a safety hazard, and a bait-and-switch.