Monterra Bikes at Pick N Pay

I bought a Monterra Bike for my sons birthday in August. The issue is that the bike is falling apart. It was first the seat, my hubby replaced the parts with the ones from my sons old bike. Next issue is the handle bar. We cannot spend our days fixing horrible quality. Please dont buy these bikes!!!!!!!!!!! Worst quality in the world. No wonder they so cheap..............I feel like just taking the bike back and leaving it at the door.