As I posted in this thread
http://www.testyourmight.com/threads/batgirl-reset.32865/
Batgirl has an unblockable reset that occurs when you perform an action before you EX Bola. When you bola your opponent, perform a 1 attack and then EX bola. This should end the previous combo, and set you up for a follow-up.
I do realize that this will most likely be patched out, or at least I hope so.