@Suzyboo11: What device are you currently connecting the Buds to? Can you check to see if there is anything blocking the left earbud? To double check this, please remove the eartip from the left bud > Clean the sensor, mesh and eartip with a clean cloth > Clean the receiver with a cotton swab and dry brush to remove any foreign material > Reattach the eartip. If you're connected to a compatible Samsung phone, can you also open the Galaxy Wearables app, tap Find My Earbuds and select the magnifying glass symbol. Both buds will start beeping. Is the sound balanced in both earbuds? Please don't perform the above action while wearing the Buds, as the beeping can be quite loud.
If the issue persists, try placing your Galaxy Buds back in their case for 10-15 seconds, and close the lid. Reopen the case to enable Bluetooth pairing mode, and check the screen of the device you're connecting to. You can also try placing both Buds in your ears, then tap and hold both earbud touch pads to enter pairing mode. If this doesn't work, please make sure that you are within 10 metres of your phone to stay in range of the Bluetooth connection. I also recommend checking for an update on the Galaxy Wearables app by going to About Earbuds > Update Earbud Software > Download and Install, to see if this helps.