Were you admin jailed or does it just say you're admin jailed?
It may have been a wrong ID from an admin, if so request an "unjail" via /assistance (If you can in admin jail), or by PMing an admin IF and only IF it was a false ajail and /assistance doesn't work.
Not many commands can be used in ajail. If it was a necessary jail and/or you can't contact and admin then just wait for your time to run out.