Sears 18" chainsaw i just

Question

sears 18" chainsaw i just finished cutting some wood and went back to cut some more the chain does not move I took the cover off and tried turning the sprocket thing it doesnt move this saw is only a few months old I thought I could see if I could fix it before I took it back cos it may be a week or two before it would be repaired and I need firewood any suggestions would be appreciated
Tom