You were automatically banned.

I joined the server to welcome you, you enquired about gaining staff privileges, you left spawn area (ignoring the rules, apparently. You literally have to walk through a sign saying "please do not break blocks here"), and broke a glass pane outside someone's house, then pretended to not know what you could have possibly done to warrant being jailed. You could not do further damage as you had been restrained from doing so. I tried to talk you through how to appeal, but got cut off by the auto-ban. I can understand why you might assume I had banned you, but considering your misrepresentation of the facts I don't believe you had pure intentions.

You now claim to have intentionally broken a glass block to "test" if you could break a block, but "accidentally" broke it because you did not expect to break it. What was the purpose of the test, exactly? Either you wanted to know the limits of the area you could grief, in which case it wouldn't matter if you could replace the block, or you wanted to know the limits of where you could build in which case you would surely want to break a block you could more easily replace. It would appear that you don't care about other player's builds to such a degree that you would willingly risk leaving holes in them, and would now defend your right to willingly disregard potential damages.

The appeals process is there to weed out players who would treat others this way.

This is not the place to process appeals, so if you would like to contest the ban further you will need to do so on our forums.