Root stuck on samsung logo after factory reset forgot i rooted it

yeah i rooted my phone a while back and factory reset it becausse my phones attery life was acting upit was going down while it was on charge and i wasnt using anything at all. I had ap killers and everything. I dcont know what else to do . I cant take it back to metro will lose the service. Cant think of anything else to do any suggestions? Btw im new to this stuff so i might need steps :)