So recently my dishwasher stopped working.

After disassembling, I found out that the problem was just the on/off button. It won't work because when you press it, it pushes a plastic piece that is broken. There are 4 buttons (1 and 3) in the picture. The one broken is the one to the left by itself.

It's a very small problem, but a replacement is expensive because you have to buy the entire piece with the circuit included. Any idea on how to fix this?

Here's a picture of a new plastic case:

And here mine with the left button plastic piece missing: