She won't get alimony, no chance at all.
Poland has a shocking track record when it comes to respecting the rights of foreign parents, so don't expect the courts here to give much of a crap about her taking your child back to Poland without your permission.
The fact that she has done so will change very little when it comes to the amount of child support that you will be ordered to pay.
What can i expect to happen? and what can i do?
Court hearing in her place of residence and then an order from the court about how much you'll need to pay. You can and should get a lawyer.