Your ban time is being reduced to 2 days, You were kicked approximately 20 minutes before the briefing for mic spamming. I understand that you do want to have fun, but screaming into your mic is not one of the ways to do so as it is extremely obnoxious and frustrating over a large period of time. Next time you need to be promoted make sure a ticket is made, and refrain from screaming with two other people as it does not look good, especially when you have a large list of warnings next to your name. The main reason as you were punished in such a harsh way was due to the fact that A) it was in a group of 3; B) you have a very poor track record. Make sure that you stay out of situations that make you look bad because it does not look good.
p.s. Please refrain from using the fact that you are new to the forums as an excuse, in no way was it targeted towards you, it was purely informational. I am sorry that I did not post a link for you leading to the correct spot for your appeal.