Ok So I bought a new Norco Single Speed Bike for about 400 bucks. After a couple days of riding the free wheel broke while accelerating fairly hard and they replaced it with a Shimano one that made the ratio higher so it would be harder to pedal. Then a couple days later I was peddling very hard and the chain came off while accelerating. After that I could not get the wheel back into the right position for proper tension and as it turns out the Drop out is bent and the frame seems kind of bent. I took it back to them and they used two bars and a hammer to put it back into place. Should I demand a new bike, it is only 3 weeks old, and this seems like a cover up to the issue. Could the frame bend from justing peddling to hard? I will admit I am uneasy on really "giving her" on the bike as I am fairly strong and it feels kind of uneasy as if the crank arm is gonna snap off, although this is a new bike made of steel and I only weigh 160 pounds. thanks!