Find the documents for your product. Read the warranty conditions, and decide if the problem could potentially be classified as warranty.
Make a photo of the problem and send an email to the company that sold the product to you, asking them what you should do.
Most probably, they will ask you to send the damaged product for inspection to them, or to your national distributor. Remember to make sure that you put the proof of purchase, warranty card and your contact details in the box!
If you have problems with any of the above, contact us on firstname.lastname@example.org