<human>: Can you succinctly summarize the text in 1-3 sentences?

I started grad school this semester and it was fully paid for (tuition and everything) by my Graduate Teaching Assistant-ship. Then about a month ago I decided I need to leave the program due to my depression getting quite a bit worse. So I sent an email to the graduate school offices asking if I would have to pay back the tuition or any fees if I were to decide to drop. They explicitly said that if I were to drop, I would not owe any money back. So fast forward a couple weeks and I withdraw from the program. That same day I get an email saying I now owe the university about $16,600. So I called the financial services office and they told me I would have to contact the graduate school offices about it. So I called them and they said that I should have sent my initial email to the financial services office because the graduate school doesn't really handle those sorts of things. She then said that she would talk to her manager about the email but that most likely there is nothing they can do. Right now I'm just waiting for a reply.

Basically I'm being screwed over because someone in the graduate school offices answered a question that they apparently shouldn't have answered. And now I'm in the hole $16,600 because of it.

So I guess my question is: Is there anything I can do? I still have the email where they said that I won't have to pay any sort of fees or back tuition.
<bot>: Graduate school offices said I will not be charged any back tuition if I withdraw. I withdraw and am now being charged $16,600.