Take that back to the place where it was purchased. It sounds like the manufacturer warranty should take care of that type of damage.
If you can, aways buy KR bags. Most of them have a 5 year warranty and there durability can not be beat..
I know in the past Columbia bags have not had very good reviews..
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My first child.. Hannah Allison Kiser born 4/30/2007... My little angel..
Roto Grip.. King of Them All!!