[Closed] Officemate who won't shut up

What do you do - how do you deal with this? Here are the facts...

- I significantly outrank her but she's been around longer. Bluntly she is support staff whereas I'm business core.
- she's mentally quite unstable and generally a very angry person (in an otherwise very low-key office) but I'm currently on her "good" side although I think she's picking up on frostiness lately
- is constantly on the phone shouting in a way that makes it impossible for me to do my job, even when I'm on sensitive calls myself (drowning me out). One time I did wave at her to turn her ****ing volume down (she is support staff; I was on a client call) and afterwards she got well pi$$y about it...
- we've recently installed new IT systems and this has been a particular catalyst for the telephone temper tantrums. Also it means there's been a constant flow of IT staff in our office which is very disruptive and unnecessary (everyone is having problems but she's the only one being a diva about it...)
- whenever I'm crazily busy she asks me to look at photos of her nephew or comes out with assinine mundanities like "JHW, I'm HUNGRY..."..."JHW, shall I have the salmon for lunch or penne arrabiata?" etc. When I'm 5 minutes off a deadline that's been building for months...

Shall I headbutt her/"quiet word" her/marry her?

/rageattack