Job isuess quiting?

ok i work at boomers in upland and recently just hired me like 2 weeks ago but was doing volunteer work for about 2 mounths becuase im in key club so we do community services for free you know well anyways now every time i call they dont need me they havent told me ur fired or let go or anything i havent gotton a check and theve hired alot of people after they said they dont make alot of money to give out to all there employees they make there money in the weekends!!! andways, ive gone over there just to see my self and they have alot of workers and still are short but dont whant me to go work??? do you think there going to let me go, should i quit but i think there angree cuz i told them i got another job for mon-tue and the reason was becuase in key club i volunteered those day without pay so i think they liked the free work and i cant work without pay forever you know and they treat me like crap, and they only pay me for weekends but now the dont need me so what should i do, quit???