Note: Kindly ensure that there is no Cellophane paper on the Earbuds Charging using a laptop/computer:
Put the Earbuds inside the charging case.
Using the C-type USB cable received with the product; connect the Charging case with the charging cable to the USB port on the laptop/computer.
Make sure that your PC/laptop is turned ON and not in sleep / hibernate mode.
If it still doesn't work try with a different USB port on your laptop/computer just to be sure whether an issue exists with your USB port else try a power adapter
Charging using an adapter
Connect the Charging case with the C-type USB cable received with the product and connect it with a 5V adaptor.
Make sure that the wall socket is functioning properly and not loose or damaged.
If it still doesn't work try to charge from a different wall socket.
If the Earbuds still doesn't charge try with a different USB cable that is suitable to connect to your Earbuds charging port just to clarify whether the issue is from your current charging cable.