They scammed me on security deposit. I paid $1100 ...

They scammed me on security deposit. I paid $1100 upfront as security, spent only three months in the apartment, and followed all their guidelines about cleaning etc. and spent 2 days cleaning the whole place. At the inspection, the resident manager Janet was "perfectly happy" with the cleanliness and state of the apartment. She told us the carpet cleaning will be around $120 (even though the carpet was clean) and I was still ok with that. But now when I got a check of only $38 a month after moving out, I am of course upset. They have apparently charged $500+ for painting, $120 for carpet, $98 for utility bills which I have already paid, and other stuff. I emailed the resident manager who simply said she doesn't deal with this and I should mail to the company at some PO Box. It's ridiculous.