You could try buying a cheap key for the game in question (Planet of War: The Legend of Fu). Once the game is activated on your account it will no longer flag sgtools checkers like me.
If you don't want to do that, then there is no further problem. You have served a suspension for not activating the game - will not matter if other gifters pick up that the game is not activated on your account as from now on support will tell them the suspension has been served. So the gifter will then hand over the key.
As for contacting you directly, I am not able to comment on your profile, so what ever settings you have, you might need to check that. I did issue a friend request, but honestly, once an unactivated game or multiple win is flagged by sgtools, I always send in a support ticket for them to investigate.
So, guess you just need to slow down when you activate your wins in future, and good luck with wins for the future.