I have no idea how to help you on that one, bpkid. I believe you posted once that you are 11? I'm not sure a random adult (store owner, or employee or manager) is going to believe you, but you could try.
I don't really have any good solutions for your problem, other than having you get some sort of adult to look at the issue...I believe you, it's just that some people are probably going to go "stupid kid doesn't know anything". If somebody does that, the problem won't get solved.
Anyway, I'll let some other people post, or pm you or something and maybe you can get some better solutions on how to keep the situation from exploding and getting the problem resolved. Good Luck.