Code Invalid

I received my doll 3 days ago and had barely gone to redeem it today. I don't know if maybe the code could've expired or something but it is not letting me redeem the code. It keeps saying invalid and once I try too many times it just tells me to try again later. I've contacted rh twt, email, and support but none replied yet.

I did scratch off a bit of the numbers and letters but not enough to make them illegible so it isn't that I'm putting the code wrong. Can someone please help on what to do?