The bearings are servicable. Just like Trex said , they can be removed by either method. You might need to drill a hole thru the locking collar, being sure not to hit the axle. Then use a sharp chisel to break the collar across the drilled hole.
I dont like reusing bearings & since you may need new collars, might want to look into all new pieces. It is a judgement call, how hard did they come off & where they damaged in the process.