College Admissions Question Help

Hey guys I'm from Georgia and I'm applying for Southern Poly it's a four year school. So far in Georgia I'm positive that they don't ban anyone from going to school since I just finished a two year community college then this happened. From the admissions lady:
"You can not register for classes on a Tourist Visa, you will have to apply for an F-1 Visa if you wish to take classes at a GA University. As I stated previously, the financial statement would be for the processing of the I-20 and in the amount of 28,000 US dollars. F- 1 student Visa holders have to be full time students and register for at least 12 hours a semester.
Thank you "

Now I don't want to sound like a know it all to her on emails but I went to school already and this never happened, as far as I know there is nothing blocking me from going. So my question to you guys is how to I respond to this difficult email because a lot rides on me going to school.

bro lol what the .....tell her the truth ur undocumented and u spoken to the admission office and so forth.....im more than positive that someone will give u a better answer but just about the same as mine but more meat on the bone i guess.....