Logitec G604 Mouse Very Low Tracking Speed

Hello I also purchased a Logitech G604 using it on a Mac Book Pro.

It was fine in the beginning, but then the tracking speed diminished SIGNIFICANTLY - I need to lift the mouse in order to get from one end of the screen to the middle, not even the end. I had installed GHub but I found it not useful (not a gamer, I just needed a precise, silent and anatomic mouse for office use), so I uninstalled it.

Can you please help? I paid a considerable amount (over 100Euro) and this mouse is not even doing what it is supposed to be doing: scrolling!

Thank you