You need a lawyer in the country your stbx is in. Do you have one? Alternatively, can you find your way through the legal morass and figure out how to file papers over there yourself to get out of this marriage? Maybe if you say where each of you are, someone might have some useful links to help?
Can your legal ties over there (and any debts) follow you to the country you live in now?
Lots of questions, sorry. But it seems like a mess that you might be able to find your way through if you can see the wood for the trees.