How can I contact an advertiser through the app? November 19, 2018 16:51 Updated When viewing the details of an ad, simply press the blue "Call" or "Write" button to communicate with the advertiser. For more details about messaging, please click here. Related articles How can I contact an advertiser? How can I reply to a message? How does it work? How can I share my ad with others? How do I know if I received a new message?