one of two things has to happen, either the bank will have to negotiate or I have to walk away from the property and leave to the bank.
Wrong. What will happen is option 3, where the Polish bank will pursue you for every last grosz that you owe them. And they will - while they might negotiate, they certainly won't tolerate you walking away.
if I do what is the implication for me ? I dont live in Poland, in fact live in Asia and have done for many years.
What they would probably do is obtain a European Arrest Warrant against you. Crossing a European border covered by the EAW scheme would instantly set off a red flag - and you'd be on your way to Poland to answer to court. With the concept of personal bankruptcy not really existing in Poland, you'd be in trouble.
Don't assume that they will do nothing - they will do quite the opposite.