you cannot bring back your wireless interface back.
ifconfig wlan up wont work
you get the message Operation not possible due to RF-Kill.
Error is due to soft block or hard block, wireless card has been switched off from the kernel.
Sudo rfkill list
find out what is being blocked
sudo rfkill unblock wifi
sudo rfkill unblock all
re run sudo rfkill list to check if the wireless has been unblocked.