Please take note that PayPal does not like to process two complaints for the same purchase. It does not mean it can not be done, but they discourage it.
We had a student mention in class that they had to open up a shipping dispute when their item did not arrive in a timely manner. The item did eventually arrive but it was then that they noticed that the item was misrepresented and they wanted to return it.
PayPal considered the issue closed when the item arrived and initially were not going to let them start an "Item significantly not as described" dispute. We encouraged them to call and PayPal re-considered.
In this case, we believe the student has a strong case for the product being misrepresented, so we hope PayPal and the seller will do the right thing. From preliminary e-mails, the seller does NOT want to do the right thing, but PayPal could strongly influence that.
Another lesson learned from this is to be sure to read the seller's return policy. In this case, there was none. Just because they do not say what it is, don't assume they will make adjustments. Write to them and get it in writing.