I think you should ask this over on diaper bags.

I agree that a $160 bag should last longer than 2 months. If you can, go back to the store you got it from. IME they can sometimes have more 'pull' with the manufacturer because they buy alot of product vs. a person that only buys one. They also may be more likely to want to help because you are there in person and not just a person on the phone.