Follow these steps to unmute your Logitech headset:
Type control panel in the search bar and open it.
Now, set View by to Small icons and then, press Sound.
In the upcoming window, go to the Recording tab.
Then, right-click on Logitech G533 and press the Properties option.
In the next window, go to the Levels tab and move the slider button towards the right to make it 100%.