Brake Fluid Leak problems of the 2018 Dodge Grand Caravan

I was in allentown and my brake pedal drifted halfway to the floor while at the stoplight. I was at pep boys and they bleed the brakes. That seemed to do the trick. Here we are two weeks later and the brake pedal is getting spongy and drifting again. Therefore no fluid leaks any place. There have been similar complaints on online boards. I paid cash for this van July 1 2019 . I should not have this problem. This is a manufacturer defect and is a safety hazered for myself a d my passengers. Not to mention other persons on the road or crosswalks.