Help i locked my keys inside my car!!!!?

I locked my keys inside my 1996 buick regal, actually it`s a rental, so please no break the window ideas, the keys are in the ignition, i`ve tried the coat hanger idea and using pins, screwdriver and a knife in the key hole, i don`t have money to call a tow company or a locksmith, so if anyone has any ideas what i can do that would be great, i`m getting desperate.