I am having a problem with a person who was a friend of mine. I have
made it clear 3 times to I want absolutely nothing to do with her and
I do not want to be contacted by her. She is still trying to
communicate with me.

So far it has been non-hostile contact. I believe this falls outside
of the scope of an injunction and would like to know what law gives me
ground to first warn her with in a certified letter and if she
persists take further action.

What legal standing (Federal and State of Florida) do I have in
preventing and enforcing my desire to not have her communicate with
me? Please cite any specific laws that are relevant.

This may be of interest to you:

http://www.aardvarc.org/stalking/states/flst.shtml