I know this may be frustrating for you. Have you reached out to 1800 samsung for assistance? Doing so will assist you with your issue. You will also be granted with warranty status and a mail in repair if you agree to those terms and conditions. I think in your case that would be one of the best options.
I'm not sure what troubleshooting you have done if any, but here is something you can try. It may or may not be a fix, but at least we can start somewhere.
-Restart both devices: Galaxy Buds and smartphone.
-Remove the Bluetooth profile for Galaxy Buds from smartphone and try pairing the Buds to your device again.
-Go to Settings > Connections > Bluetooth. ... Re-pair the Galaxy Buds to your smartphone and check to see if both buds work normally.
I hope this helps in any way. Have a great day.
I am sorry you have tried all the troubleshooting steps to get this issue solved with your buds and the problem is still re-occurring.
My suggestion is to call 1800-SAMSUNG (1800-726-7864). Once you call them, try to reach a representative and have the valid proof of purchase handy and the serial number of the device. Let them know you want to mail in the buds for service and they will email you a UPS shipping label and give you the proper instructions on how to do this process. It typically takes 7-14 business days for you to receive them back. The serial number and the proof of purchase is typically what is needed as long as the device was purchased less than a year ago. They should be able to give you replacement buds once this process is fulfilled.
If you have any questions, please let us know.