You actually weren't block for that reason. The reason you were blocked because you double posted within 30 mins and that block usually lasts one week only. You can read more about that
HERE! In the future if you haven't reached the 80% of returning llamas to others and you decided to ask for more on the group page, then you would be blocked until you've done so. More details can be read
HERE! For overall blocking policies and how to get unblocked you can read about that
HERE!