I neither use whatsapp nor facebook
OR
I don't use whatsapp neither facebook
Is second example correct?
I neither use whatsapp nor facebook
OR
I don't use whatsapp neither facebook
Is second example correct?
Your second example isn't correct, but you can use "neither" without "nor", if you are not explicitly naming both alternatives.
For example, if someone asks you, "Do you use Facebook, or Whatsapp?"
you can answer
"I use neither." or "No, neither one."