A repo company changed the locks on my mobile home because they were at the wrong address. What kind of action can I take against the company?

First its not a good idea to piggyback your question on another thread. This can lead to confusion. So I've moved your question to its own thread.

Not much. Was the error corrected? How long? Did you incur any extra costs due to the lockout? Basically you can take them to small claims court to recover any provable losses you incurred.