Long distance charge

I got billed for a ld call from LA to a town close to where I live. I have never been to California. My phone has never been in anyone elses hands and my bro, who is on my plan, has never been to CA. Is there a way for someone to charge a call to another persons phone? I called and challenged the charge but I haven't heard anything from Cingular yet. The first lady I spoke with said that they would cut it in half. Umm, no. The second guy said that the charge looked right just because I didn't make any calls from where I live, N. Alabama, on the same day. I hope this doesn't become the norm with their service.