Did you say you have 20,000+ followers on Twitter and even though they're fake, you want to GET RID OF THEM? If you didn't have to pay for them then why bother? Your Klute score must be through the roof. You should find a way to monetize your Twitter account as you probably have a rather high Twitter profile even if the followers are merely dummy accounts.
I'm struggling to get over the 83 to 85 followers plateau though I refuse to pay any goofball in India or Pakistan to create any amounts of Twitter dummy accounts to follow me on Twitter.