When I swipe up, it goes down; when I swipe down, it goes up. When I swipe right, it goes left, and when I swipe left, it goes right. Why is that?
This indicates 2 things:
The mouse is actually dead, and you have to replace it with a new one.
The drivers are bad or corrupted causing confusion. Reinstall the drivers and plug it in another USB port or connect the wireless / Bluetooth received to another USB port and then install it through the available drivers.