this machine will not communicate

First of all, you have to have exact change. Coins only. Then you push the little yellow buttons at the base, and the entire inner clear plastic apparatus turns. And when you have what you want lined up on the left side, you open this little plastic door. Except if you overshoot, sometimes it won't spin back, and you have to spin it all the way around again, unless you're my sister, and it stops moving entirely and starts going CLANG CLANG CLANG and I shout "Run oh God run for your life!" and you just leave. :(