Offroad advice required

So was driving my Jimny(5door, MT, stock tyre), and got stuck in mud, tried 4H and 4L but couldn’t get it out, the car kept sinking as all the wheels kept spinning, the car was unable to get traction.

Mud= it is a receeding dam reservoir, there the ground was substantially wet and muddy, only the top surface was dry.

Any suggestion on how to tackle this kind of surface?