The ignition barrel on my 2012 VW Amarok Highline is "freewheeling" and I can't start it. I took it to a VW dealer in September as the key was difficult to remove and hard to turn to start on occasions, but they couldn't find anything wrong. Now it's parked in the main street of Yass and can't be started.
The lock barrel spinning is usually a sign of the key being worn. When it happens remove the key and insert it again, or use the spare key, which presumably won't be worn.