Don't buy a car from Hyundai

I purchased a vehicle from Lenasia Hyundai in July. The next week they closed down without informing their customers. I'm driving a vehicle that is not registered and the permit has expired. Contacted their head office and given the run around and told lies all the time. This car was purchased brand new & has so much issues. Boot has problem closing, the tint has bubbles & the engine is a problem. Called them several times and have not heard from them. What bad service. No one seems to be helping me. They even told my husband that we can do whatever we want to.