• If you are not the person that was banned/muted, you are only allowed to post evidence. Trash talk is unnecessary.
Your "response" to that other player's insult was you blocking his sentry with your dispenser. According to the rules that counts as griefing, so your ban isn't getting lifted.
 
Because a lot of posts had to be deleted in this thread, just a reminder: don't post unless you have something that can help the case at hand. Chat logs of someone being mean to you isn't going to help you get unbanned, and random friends trying to vouch for you isn't going to help either.

If you have some evidence that proves you were innocent that would be a example of a relevant post.