Feeling Helpless

Hi I'm in need of help I'm a single mother of two who saved up for a down payment for a car only to purchase a lemon. I don't have the best credit so going to a Used dealer ship was my only option. I purchased a 2012 Malibu and 2 months in the motor has went out in it. This being my first car I have ever bought I really wasn't aware of all the issues that might come with buying a car with no warranty. So I'm stuck with paying for repairs now I'm without a car and I have limited funds and a lot responsibilities please help it's sad the way Used car dealerships take advantage of hard working people just to make a sale.