My 2012 Mitsubishi Outlander won’t go forward or backwards

I’ve had the car for almost 2 year,
shortly after I bought it I noticed the
rpms surging and decreasing while
driving. I let warranty shop know they
said it’s running as it should. Couple
months go by going into winter 2
days into the winter weather i walk up
to a car that won’t move. It has a a
airplane sound coming from the
engine, burning smell, and rpm
fluctuations. Please help!!