Don't buy any cars from Mega Auto Motors Boksburg

after a week i still haven't hear anything from the bank or the dealer, the dealer is owing me money and dont respond on anything, the bank also dont respond after i sent out numerous emails to them, my car is now standing for 2 weeks and know one can tell me what to do? can i sue the dealer for the money he didn't give back? i cant pay for a car that is just standing in the garage the hole time, dont buy a car from mega auto in boksburg.