What can i do? what do u think i should do?

i had reported a manager of a local store for slander recently to the bussiness's corprate office. corprate got in contact with the person and confronted them on it. that night i got harring and threating calls from employees. but today i get a call from the corprate district manager saying that i supposedly stole from this store. but the thing is when i"supposedly" stole i wasn't even in town not only that they gave me 3 different dates of which i "supposedly" stole on. i haven't been in that store since november 07. i asked them to tell me what i "supposedly" stole it was a box of hair dye. when i asked for the report they said they don't have to produce one. i haven't dyed my hair in 18 weeks to be exact. because i'm pregnant. also it takes two boxs because my hair is thick. plus i only do wacky like pink, purple, bright red, black hair colors. which they don't carry. is there anything i can legally do? or should i just let it be and let them win?