I do not have the option for Quick Responses to buyers from their CONTACT button on the gig page. It just opens up the popup dialog box. Why?
When buyer message you then you can reply him and if you give quick reply then it effect on quick response
Yes. But they use to show up on the initial contact, not just the response.
If your contact button is not working then you should try different browser if still not solving then you should contact fiverr support