One side of my Bluetooth earbuds doesn't work

[Kiwi_13]

So, I have these Bluetooth earbuds, so their is not a earphone jack, and I can't here sound out of the left side! I have tried A lot of things! I don't understand what happened, I took good care of them. If you know how to fix this please let me know as soon as possible!

 

[Reynod]

Did they come with a warranty?

Is the rechargeable battery able to be replaced?