Judging from all the other ban requests i've been reading it could take from one hour to a couple of days however they will completely deny your request if you're to spam them, GL with getting back on the server :)
Include this
Your In-game name:
Your Steam Profile ID:
Your GUID (Using this tool input your steam ID and press enter):
Date & Time you was banned:
Please copy and paste the rule you broke:
Please give reasons why we should give you a final chance:
I'm currently going through the same...
Your In-game name: Michael
Your Steam Profile ID:http://steamcommunity.com/id/GTX691/
Date & Time you was banned:
30/06/2015 around 3 am
Please copy and paste the rule you broke: 5D) You are not allowed to return within 1000m of where you was killed within 15 minutes after you have been...