I think cluster seizures are repeating seizures. Is there any way you can borrow the money to get him to a Vet? Is he still having a seizure right now?
I'm very sorry, are you certain she is dead and not stunned? Double check and see if the heart is beating, left side of chest her where her elbow reaches the chest.
I'm really sorry to hear that your cat passed away. In cases like these we always lock the thread, as a sign of respect. When you feel ready please come and start a thread in our Crossing The Bridge forum in memory of your cat.