It don't matter what a seller says in his/her listing about no returns.
If the item is defective then file a claim with paypal within 45 days
for Item not as described.
Remember, it is your money so don't let the seller drag the complaint past day 43 without you filing a claim.
You may have to return the item to the seller with delivery confirmation at your own cost.
Some sellers will pay for the return but they are not required to according to paypals policies.
Some sellers will accept pictures of the damaged item and just tell you to chuck it.