Can I interact with my client via other communication modes like ■■■■■, Google Hangouts, Messenger, email, etc?
No, you can’t.
To protect our users’ privacy, user identities are kept anonymous. Requesting or providing Email addresses, $kype/IM usernames, telephone numbers or any other personal contact details to communicate outside of Fiverr in order to circumvent or abuse the Fiverr messaging system or Fiverr platform is not permitted.
You should read Fiverr ToS: https://www.fiverr.com/terms_of_service
thanks for your reply.