Joell Stroller Flipped Over When My Baby Was In It!!

 I've only had it for 7 months and the front wheels are already acting up. I had to swap them out 'cause they were always causing issues. The worst, it actually flipped over with my baby inside because of some design issue.  if it wasn't for that safety harness, my kid could have been messed up. the back wheels are busted where the brakes are supposed to work.  every time I gotta lock it, I gotta bend down, take off the wheel, and put it back on in a spot where it ain't busted. This thing is a total mess. It's been a total pain and super unsafe.  I want them to take responsibility for the faulty design and give me a replacement. Thanks!