There are a number of common responses to Apostates, and yes, you hit the nail on the head with the word "responses", because it is a rare thing when JWs give actual "answers."
Here are a few:
"You're just bitter." In the mind of the typical braindead dub, this brilliant rejoinder thoroughly demolishes every logical argument and every fact presented which proves the WTS religion is false.
"Were you ever a Jehovah's Witness?" A "yes" answer proves to a braindead JW that everything you say MUST be a lie then.
"Why are you filled with so much hate?" Arguments proving their religion wrong aren't really arguments at all. They are "hate." Makes perfect sense since braindead dubs don't have any other arguments and that response entirely satisfies them so they can declare they won the debate.
And of course, there is the old standby, "You must be an apostate." This means, of course, that everything you said does not need to be checked out. It HAS to be a pack of lies.