Do you think this is fair i am screwed?

I worked at walmart in the signing dept.My area manager is the most evil person in the world, stirs problems all the time. Expecially with me.My istant store manager, pretty much runs the store always bows down to her dont know why.I get along with him and he is fair, i have had some personal issues making me miss work. .Well Michelle my direct mgr finds everything and writes me up. Thursday mike the t mgr and michelle worked togeater.i got a call into Michelles office and mike was there.They both gained up on me on missing signs. I worked full time for 6 month, Michelle then told me my hours will get cut to 18, i told them i signed a sheet for at least 35. Mike pulled it out it said min 18. Michelle then told me my life will be a living hell here, Mike laughed.They had a volunary step down form, i was so nervous and signed it and left. I talked to chantal the hr mgr, she told me i signed a step down, meaning i am done. I also found out i cant get unemployeement,