Hi, we recently moved into a new home and inherited a beautiful garden. One area which worries me is the herb garden and the support structure. As we are new to how this was set up, is like to get some possible advice on how to repair the retaining wooden wall to avoid it from collapsing.
Here are images where you can see gap in the wall.


My thoughts are to remove large amount of the soil to allow me to hammer the wall back in. Just wanted to check where this was the right approach.
Thanks
Khoa