How you ever reconciled with an ex that said "You'll never hear from me ever again"?

Breakups can sometimes be very painful, especially after a long-term overall great relationship. I know most of the time words are said out of anger etc. And often as Fading affect bias (F. A. B) takes place, people's thoughts and emotions change.
So you have an overall great 3-4 or more year relationship, a day comes that you guys get angry and argue etc. It leads to a breakup and they dump you. Their last word is "You'll never hear from me ever again". So have you ever reconciled with such an Ex?
How you ever reconciled with an ex that said "You'll never hear from me ever again"?
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