How to appeal my waitlist decision? Pl help.

I guess i am waitlisted because of my poor grades during the 7th sem. I have since significantly improved my grades, please let me know how should I submit an appeal?

Will that be an email to admissions counselor stating my improvement in grades? or through Common App process?

Thank you

are you a transfer student or freshman? if you are a freshman, the deadline to send an appeal was April 15th.