The least you can do is link their profiles in your post.
https://bitcointalk.org/index.php?action=trust;u=109711You could have taken the unstrusted negative feedback seriously and saved 90 bucks.Btw,your scam accusation doesn't make sense for now due to inadequate proofs.Please add whatever you can to make it seem like a scam.
However, the question to be asked is: how is OP able to sell the gift cards at a 75% discount? And if they are able to do such a thing, is it legal?
Regardless of it,a scam is a scam.