Hello and welcome,
There is never a guarantee with regard to the commission's decision typically, but you do have the right to appeal if you believe they wrongly deny your application for unemployment benefits.
When you quit, the burden is on you to show that the change in hours was an undue hardship to you and that you exhausted all options before deciding to quit.
Because of this, it is best to make sure the affects on your health are well documented by your medical provider.
In addition, you should request in writing an accommodation from your employer or any other option that could negate the need to resign.
If you can prove you have explored all reasonable options and the shift change is an undue hardship, then your application should be approved if you quit.
Here is a link that provides more information on reasons why workers are denied benefits:
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