Thank you for posting and joining our community.
I'm sorry to hear about the issues you have had using your headphones and would be happy to help you get them back up and running.
I'd like to gather a bit more information on the situation, so I can help troubleshoot this as effectively as possible.
When you try and turn on the right headphone, do you get any LED response on the earbud? If so, what does it show? Also, what do the charging case LEDs show when you have both buds connected to it?
What I would recommend you do to start with, is a reset of your headphones. To do this what you would need to do is:
I look forward to hearing from you.