Inside car light flickering, Battery dying

What is your question?

The inside light keeps flickering on and off. I replaced the alternator and battery per when this happened before that is what I was told it was. The lights are still flickering on and off and it runs the battery down. The cruise control also acts funny and speeds up at certain times. The abs control and various lights flicker on and off. I took it to the Jeep dealership in Greenville and they advised that I would have to wait until the car stopped working per when they hooked it up to a machine it didn't give a reading anything was wrong. Lastly, the inside car light only comes on when I open the door. It no longer works when I try to turn it on.

What makes this problem better or worse?

When the air condition is worse, when I go up a hill

How long has your 2014 Jeep Patriot had this problem?

Five months