The high pressure water pipe parallel to my front fence was busted and a lot of silt was lost due to the water leak to the surface.
One of the posts has tilted immensely, along with sinking of the foundation the gate rail was sitting on.
the gate has tilted towards pedestrian but it is not of any danger of collapsing, and I have since moved the bracket outwards so it can still be open and close without issue (for now).
But the tilted post is pushing pressure onto the aluminium slates, and pushing the post on the other side of the slate to tilt, and press against my pedestrian gate so it cannot be open or close properly.
how can I fix the tilted post? Do I have to remove all the slates, dig til I reach the concrete base, and somehow readjust it’s angle, and pour more concrete in before covering with mud? Are there any simpler option, just so I can slightly straighten it and at least relieve the pressure on the slates? In fact, because of the pressure, I am not sure I can remove the slate as it is not pushes against between two posts.
what should I do?
P.S. if there are any tips on how to level the ground, DIY or not, please kindly let me know, I don’t even know who to call to get the sunken ground fix.

Tilted post is the one at the front, and tilted toward the right against the pedestrian gate post


