You can contact RMN, and they will credit your account manually. You will need to provide transaction information, so don't bother for the GC purchase, but for the legit purchase, it's worth reaching out.
Keep in mind that RMN has 45 days to credit, so they both MIGHT still go through on their own, depending on when Target shares the info with RMN.
Also, RMN might want you to wait the 45 days before they'll do the manual credit. This is what I was told via online customer chat when my
Amazon purchase didn't track. As I bought shoes for my kid and no GCs, it's worth waiting a few weeks to get my $10 back.