What would making the situation right look like to you? A person isn't happy with the product, so they offer for the person to return it for a refund. I don't see it being made any more right than that.
Don't get me wrong - I wish it had the Gangsta Boo verse but I'm not super disappointed. It's still a great pressing. TTL isn't going to jump through hoops (that may not even present themselves to be jumped through) to remedy this. If they offer refunds then you're made whole. You don't have your ideal pressing but you have your money back.
Was it promised or advertised as including the gangsta boo version? If not, then why would it be expected if, by the sounds of it, it’s common to find the song on vinyl both with and without the verse.
@Tys1 The jacket says "Featuring Gangsta Boo" on the back and the back of the jacket was shown on the listing. So technically yes, it was advertised that way.