Block her from your email and your phone.
It is very easy to do.

She is emailing at work, and I don't know how to block he there

oh!
Maybe you can ask someone in the IT dept. if they know how to block someone?

Have you point blank asked her to please stop?

on my phone, blocking calls is easy, but to block texts (and calls), I downloaded the free app called "BlackList". I am still notified when they try and call or text (can't remember if there is a way around that), but at they don't show up in logs. Some carriers will block texts for you (if you call or go to their website).

https://play.google.com/store/apps/details?id=org.baole.app.blacklist&hl=en

As for gmail, I looked it up, and they don't have a block feature, instead you can set up a filter, such that their email goes to your trash (which empties out every 30 days). Below is a youtube clip that explains how to do it (giggled at the snoring dog in the background, but I thought it did a good job showing you how to do it).

http://www.youtube.com/watch?v=j0JPKxcrAUc

If you can't view youtube at work, the below link also explains how to do it.

http://www.howtogeek.com/howto/the-geek-blog/how-to-block-emails-from-your-psycho-ex-in-your-gmail-account/

The comments section has some good tips, like how to set up canned responses (for example a fake auto responses that look legit, that they've been blocked, or the email no longer exist). About 3/4 of the way down the comments (April 24, 2011), explains how to do the canned responses. You can probably find something on youtube as well.

Good luck (took 2-3 months for my texts/ calls to completely stop).

I told her a month ago that I was done, I haven't given her imprestion that I wanted her. But she still email's me, and text me, saying she missing me and want's to get back together. She lied the entire time I dated her I do not want her, but she wont stop contacting me.

@MTZ3, I went to the you tube video just to hear the dog snoring!
hahaha! It is so funny!