As stated before, there is no timeframe. As far as I am aware a lot of staff are busy with other things, so all you banned people's are going to have to wait a little while longer.
there was a time it took literally weeks to get unbanned. Whatever time you are waiting at the moment for your appeal to be reviewed (doesn't mean you WILL get unbanned) think yourself lucky it is not as long as it has been before
There is a support page with estimated time frames etc.