I got turned down for unemployment because my job said that quit. I was hurt on the job and couldn't work anymore. Do i have a case?

I was hurt on the job in Dec. 2012 and was told to come back to work in June 2013 or I would be terminated. My doctor gave me a work release with a lot of restrictions and if I couldn't handel it to come back to his office and he would put me back on the no work status. Even after taking my medication like the doctor said I was in pain and could only work a day and a half. I told my manager that I couldn't take it any longer and he said ok. I went back to my doctor and he put me back on the no work status. I tried to get unemployment but was denied becasue my job said that I quit.