If you need to pay influencers for their work — squeeze out everything you can.
First of all, require that an influencer posts to all their social network profiles, not just to the one you discussed at the very beginning. And also, ask them to put your ad message into their Skype status, email signature and WhatsApp profile.
Whatever the result, call the influencer 10-15 times a day, starting from 6 AM to the late evening, and spend 15-20 minutes talking about nothing. Ask questions about the progress of the preparation, give them highly valuable (yet unsolicited) advice, ask for changes in the posts they already did.