You need more time to regain trust. Between you having resigned from SA back in May and you becoming an admin only less than a week ago you've been banned on countless occasions including a permanent ban less than a month ago. Giving you one of the highest positions possible on the server so quickly is a rather silly idea in my honest opinion, especially considering the way you left the previous time.
You're a good guy however. You know what you have to do, have a good love for the server and try your absolute best to help it. I do not believe you deserve this now but in a few weeks time you'd have my full support.
Good luck buddy, you'll definitely get this soon enough