Yessir, you DEFINITELY have a case against UHC. Years ago, our vain ,egotistical psycho bitch VP sales at Blue Shield of California decided after 20 days into selling season that we would be paid $10/app instead of our normal rate because our sales were too easy ("windfall sales"). Most employees were weak, chicken shitted and just accepted this treatment. I did not. I took Blue Shield of Calif to the Labor Board and WON my extra $5,000 compensation PLUS damages. It was a sweet victory. If you don't stand for something, you'll fall for anything.
And see that I agree with too. I thought people were upset because commissions are being changed, not that they are short changing business that was written prior to the notice