Help! They are everywhere! Mushrooms, they are coming for me!

I've shot thousands of them with my shotgun, but it did no good. Even
more mushrooms are coming overnight.

I tried land mines, but they don't seem to work. I tried C4, but they
are still coming back. I tried the tank of my neighbor, but even
that didn't help.

What can I do know? How can I defeat the mushrooms?

Or did they already win?

Please help!