2006 Jeep Liberty Battery Issues?

Hello as of last week I was having what I thought were battery issues. My car wouldn't start, and upon testing it was said that it was time I needed a new battery. A week ago I got my battery replaced at autozone and all was well. Yesterday my car needed a jump again, and all of the power would not work and it was suggested to me that I may need a new alternator. After another jump this morning I made my way to autozone (after testing) to find out that the alternator was fine and I had received a bad battery. After a free replacement I was not half way through the day when once again my car would not start. I am not very knowledgable when it comes to cars and I would just like some appropriate guidance. When I try to start the car it literally does nothing. No clicks, no false or almost starts, the key just turns and there is no noise or anything. Please help.