RESIDENCY

So I got accepted to SFSU but the problem is that I’m going to pay out-of-state tuition even though I have been here in CA for 3 years !!!
The woman whom I talked to on the phone told me to send all the papers that prove that I’m a resident!
So I did sent them a copy of my W-2 form and a copy of my tax return and also my California I.D card, and when I talked to here today she told me that the I.D card was issued in March 2016 and they need all the papers to be issued before september 2015 so I told her that I can send her a copy of my active bank account here in CA and it was issued in August 2015. But she told me NO that’s it and you can change your residency status after you pay for you fall semester (out-of state tuition)!!!
so what can I do right now ?