HELP! iMac stuck in zoom- mouse scroll not working.

I swear that I would call Apple on this if I had even the remotest chance of getting
through after all the iPhone crashes. Since that is futile I am asking you all to help me. My iMac is stuck in full zoom. My mouse scroll stopped working.

Here is what I HAVE tried:

Cleaning the mouse ( have done this 4+ x)
Restarting the compututer
Shut off computer

Every time it boots back to full zoom.

Please someone bail me out before I lose a full day of work!