How to remove | BY ISHYOBOY.COM which is showing on my Facebook Post

Hi guys,

I have gone through your theme files and can’t seem to delete the part where you give your website name credit on my website’s social media post. I have changed <meta name=”author” content=”creativeground.com”> in header.php and refresh fb cache also have removed this and still its showing creativeground.com | BY ISHYOBOY.COM on my post feeds. I have edits my description to make sure fb cache is being refresh and that is working. I’m trying to run fb adverts and I have | BY ISHYOBOY.COM on my adverts. I have also removed the <meta name=”author”…. and refresh fb cache but still your website name is showing up. How do I remove this? I need to run a campaign.

Thxs