I'm sorry you are having trouble.
But, I have to say that these are very standard parts, much the same as you will find on any other pedal.
We have had next to no problems with these switches.
If your unit has been used in a gritty environment, or has been submerged, your experience might be different.
You don't say if you bought it new. If your H9 is still under warranty, you should send it in.
If not, you could consider replacing the switches. Not sure that I could suggest a better switch – if I could, we would use them.
Sorry to be so unhelpful.