Hi FernandoGalvanR,
Thank you for reaching Microsoft Community.
Please try to perform a Reset on the firmware of your Surface Earbuds. See this page for details: Reset Surface Earbuds and refer to Reset the firmware of your Surface Earbuds.
If still the issue persist even after resetting the firmware, please contact support through this page: Contact Us or through our Global Customer Service phone numbers for further assistance and to check for replacement options available.