Create a new facebook page if you do not have one. Details on how to create a facebook page can be found online and at this link https://www.facebook.com/pages/create/
Provide the facebook user id of the administrator of the facebook page to your haptik representative. Refer here for steps on how to find your facebook id https://findmyfbid.in/
Once the administrator has been added to the facebook application you will be provided a link (Sample Link: https://developers.facebook.com/apps/
Provide this Page Access Token to your haptik representative.