Need advice on a CGPA issue

[nickinthebox]

So... I got accepted to a really great school with the condition that my CGPA is over a 3.3.  I've been at my university for what will end up being 4 semesters after getting my AAS at a community college in 2012.  My GPA at my school now is just under 3.1, and to get a 3.3, I would have to get a 3.9 in a semester where I'm taking 20 credits (which isn't going to happen, not to mention that finals are next week and pulling a 4 is impossible).  I emailed the school to see if they need my grades from my previous school, thinking that CGPA is truly cumulative.  They respond by saying they didn't need those grades.  With all of my schooling (including a study abroad I did at a different school that is being applied to my degree), my total GPA is a 3.56, without this semester.

 

Essentially, what is the best argument for this school to accept all of my grades, not just the last 4 semesters?  Thanks!