Greetings,
firstly you are not able to "reopen" your account on your own. The followings steps could be taken to give it a shot
Step0: Login to the forums with the account you are banned with (the posting one is not banned)
Step1: PM
TrialBot to find out why you were suspended or banned. The listed reports are by default only the onces with a guilty-verdict.
Step2: Review the reports.
Step3: If you deem a non archived report as invalid, then you may post an appeal in the
appeals board and explain why the report is invalid. Then will staff reply and discuss with you, if your thoughts are shared. When the report is in fact valid, then the appeal will not be given, as we have a strict rule on that.