It is up to the seller to pack the item properly to endure it arrives in the condition it is supposed to. If the deformities make you unhappy (I would not be happy with this) I would email the seller and explain your concerns. Tell her you are willing to give it a week or so to see if it pops back but it if does not that you would like to return the bag. If she doesn't agree you have a case for a SNAD IMO. And it is probably a good idea to get your concerns out early so you won't be accused of buyer's remorse down the road. And hopefully the next time she will use a bigger box.