It could be that the wheel was holding it tight. You did try and turn the wheel when turning the key, didn't you?
If it's not that it could be the tumbler needs to be swapped out along with a new key. But then you will need two keys. 1 to open the truck one to start the truck.
Now if you go in and replace the column lock by cutting the bolts you can use a metric hex bolt to put it back together. But first find all the parts needed before ripping things apart. Or you will be locking the truck by unplugging and removing the hole key switch for a while.