Mass email

Is it possible to have a court issue a cease-and-desist order against a company that will not stop sending me unwanted mail? Can unwanted mail be harassment? I have sent multiple requests to the company, but they do not even reply. I think that a court order would really make a point.
If so, to which court would I have to go, and how complex is the process (in Indiana)?

A former friend of mine had some pictures of me and another friend with underwear on in a sexual pose. We were underage at the time [17]. She took them and posted them on an internet **** site and 4chan.org, and sent them in a mass email to most of our friends. What should I do, legally, to both bring criminal child pornography charges against her, and to begin to bring a civil lawsuit against her?

thank you!