Ouch...
Sounds a lot like a scammer trying to scam some extra money from their scam victim by trying to make them pay for "taxes", then for "warrantee", and if you'd pay that, i'm pretty sure they'll say you also have to pay to "unlock your account", and before they leave they'll make you pay a "fine". And once you've payed all that, they'll dissapear and they'll probably contact you using a different identity and offering you to help you find the scammers for a nominal fee.
It's been said in this very thread: walk away... Every cent you give to these people is gone forever. Even if they offer to "free" all your money for a very small sum, they'll just keep that sum on top of everything they've taken from you.
The only thing left to do, is contacting your local law enforcement (if possible). Odds are big they'll do nothing, but at least your complaint will be on file, and if they ever catch those scammers you might have a very, very small chance you'll get part of your money back.