Financial aid suspension - satisfactory academic progress (SAP)

I just got a message this morning from Brooklyn college saying I have a financial aid suspension because of student academic progress(SAP). I am an incoming freshman and have taken one college now class and passed it. I have a gpa of 3.00 and i took classes that sums up to 15 credit. I tried to setup an appointment through BCPortal but my financial aid counselor is apparently not available for reservation and i am planning to go to college on Monday but Brooklyn college doesn’t take walk ins because the system is appointment based. what should i do next? i really need help.Thank You.