So you part time then to begin with ? If so, You shouldnt be complaining about your Hours.
Even though ga is "WILL" state.. there are some laws they should be careful with as far as messing with people's pay and hours.. If you think they dont want to give you a paystub due to the fact that they are cheating you hours.. theres a problem.

But, since you were PT to begin with, honestly, I wouldnt complain. Now, If they do fire you or you quit whatever it is..
You can collect unemployment if they have no proof of your performance, like written documentation or something.. a Separation notice is not really needed to get unemployment.. some places dont even give them out.

Believe me man, If they dont have some sort of documentation/proof where you and the employer both sign... they are screwed with the unemployment office and you will get your money. But, thats if they decide to fight your case. If they dont, even easier for you.