<human>: Summarize the given text in a few sentences.

(Sorry about the length, I'm just so angry I couldn't refrain from giving as much context as possible. Also, spelling and grammar is possibly a bit off because I'm still at work, and I wanted to get this out quickly.)

I've been at my current place of work for almost a year now as an assistant editor. About 3-4 months into my employment, our senior editor left, so not only did I have to do *my* work, I absorbed all of his work as well, which was great. For the last 6 months I have been basically doing the work of two people, for the pay of an assistant editor, working countless amounts of unpaid overtime... but the biggest perk has been having my own office.

I recently finished working on a project so complicated, that at one point when I needed assistance, neither the old senior editor nor a senior editor working for another company had any idea how to help me, and so I had to figure it out for myself, which I did. I'm not saying I'm an amazing editor, of course I make mistakes... but I get the job done despite pressure from multiple clients.

Recently, the business hired a senior editor, and I've just been asked to move my stuff from my office back into the old room I used to share with the Production Manager and accountant.

I feel the last 11 months of me working here has been completely unappreciated and I feel that if I can't keep my office, I at least deserve compensation in the form of a pay rise... ESPECIALLY seeing that even though I'm on an assistant editor's wage, I was charged out as a senior editor. 

So, my question is basically: what is the best way to go about asking for a pay rise?
<bot>: New guy is taking my office, and I want a pay rise as compensation, but I don't know how to ask.