I have purchased a gig (one of the top used gigs on Fiverr). The gig owner was supposed to add my website to 800 high quality bookmarking websites. But they added my website to their deindexed .info domains. I was not expecting great quality but adding to their own deindexed websites is ridiculous. They have added bookmarks using one account (admin account). So they can easily remove my bookmarks but they refused to do it (I proposed extra money to do that). Instead they proposed an extra free gig and to show me how to use disavow tool. I have tried to convince them for a few days. But now I have opened a dispute. What else can be done? My website did not get any penalty before and it is an authority website. Should I use disavow tool as they suggested? What is your experience with disavow tool. Can it be harmful for my website? (e.g. making it less authoritative by flagging it as "hmm, used disavow tool"). Let me know your thoughts. Thanks.