This will hang over you forever, whether you move or not.
Don't bury your head in the sand. Credit Unions generally try to help people who can't pay their debts, but they get very aggressive towards people who won't pay or who avoid them.
Your credit rating probably is shot. The only way to find out is to check it out with the ICB. But in any event, with a history of unemployment, you are going to find it difficult to get credit anywhere, apart from the Credit Union. If you act responsibly towards this Credit Union, even if you get into difficulties, they will lend to you again, when things improve.
Call in and see them.