man, quite an ordeal!
well, I wouldn't think they could order a judgement without contacting you. everyone is trackable.
I wouldn't deal with the lawyer - they just want money. I'd really AVOID all contact with them. (for now - unless you absolutely have to!) And no, if the last name is wrong - I don't think he can have a thing against you. (I'm not an expert though.)
I'd call and write to Chase - stating the account #, and that you have the letter from them, etc. and it is now showing as a judgement from some other firm you've never heard of and say that you need this removed from all credit bureaus. (the judgement, since it is inaccurate)
I'd start from there anyway...