Installed New Blades and Still Cuts Uneven

Lawn mower will not cut even. How to straighten mower deck that is bent. Installed a new set of blades and still cuts uneven. Slide Hammer. https://amzn.to/3y2QmnX Deck Leveling Tool. Stens Deck Level Gauge 750-442 John Deere AM130907 link; https://amzn.to/3y7Fd1I