Hi,
Since you just got them and they are not working correctly, I suggest that you consult the manufacturer's warranty statement that should have come with the headphones as to what you have to do to make a claim for a manufacturer's warranty repair or replacement.
Skullcandy products are backed by a 2-year warranty.
If you can't find the warranty, here is a [https://www.skullcandy.eu/customer-service/warranty-information/warranty-information.html|link]