So I purchased a Graco stroller for my infant a month before she was born and I opened the box to set it up got it out the stroller had the back wheels on it I just had to assemble the front wheels fast forward to me having my baby and using it couple times today I used it and the back wheel popped off while my infant was in the car seat luckily I grabbed the car seat before she could fall along with the stroller, I'm wondering what I should do or if I'm able to get a new one free of charge because evrey stroller comes with the back wheels already attached so the fact they popped off wasn't my fault I took very well care of my stroller and my infant could of got hurt they could of assembled my stroller wrong before boxing it