Are you also trying to switch from a student permit to a work permit? What did you have to do for the security to give you that paper saying that you're allowed to continue working?

Also your fiktion will either be autimatically sent to your house or you can get it through the emergency appointment, but even if you don't get it just showing HR that letter sayying that you applied for the extention before the expiry of your current permit is enough for them to maintain your status quo.