Losviajeros.com asks me money to delete the bad comments that their admins added

Hi everybody , we are an travel agency arranging tours in Greece,turkey and Egypt and ,one of admins of Losviajeros.com wrote somethng about my companies and asked me to pay some money to delete the bad comments about my company.And we applied to the legal ways and meantime we want to inform you that they can do the same things for your company.Please be carefull.Because those people earn their lives by adverts and if even a bad serviced agency pay them they write good things please do not believe the comments in that page.