Jabra Support in Portugal?

I'm using Jabra Elite 75t. I've had them for 4 years, My right earbud stopped working all of a sudden. I tried everything already posted on other threads: resetting the case, cleaning thoroughly, charging overnight, etc. At this point, I'm inclined to believe the battery is faulty. But the other earbud and the case seems to be OK so it would be wasteful to ditch this. How can I get someone in Portugal to replace the battery for me. And Jabra Team: I read LOTS of people with problems on the right earbud on this very same model. Don't you think it's odd? At this point I think it's a problem with the manufacturing, not just a big coincidence. Your help is appreciated!