I am sorry for your situation, just like to ask a question?
I your divorce is done by meeting all sharia procedures? Or you have taken this through some civil procedure?
I am not sure about Khula, but it is important to find out with religious scholars (do not ask here, as there is lot of variation in different fiqh, but you have not ask ulmas of fiqh you are practicing) if it was done in right procedure as well.
As it is may be possible that civil divorce is not recognizable then you might have a chance?