My Responses to "You Were Never a Christian"

As an ex-Christian you've heard the same spiel, "You were never a Christian." How do you respond? I respond in four ways: 1) That's just one of your delusions. There are many more; 2) Your God promised that if I believed he would save me. I believed, so why didn't he keep his promise?; 3) I don't care what you think. Deal with my arguments; 4) You're right, because there isn't any truth to Christianity. I was never saved because Jesus doesn't save anyone and that includes you.