Maybe you should patiently wait. I know it's not certain. I ordered a game key and took so long to arrive but at least I still got the key.
Had the same problem before, you just need to wait for it to arrive in your steam account. Probably after 24 hrs or even less than that
It can get up to 72 hrs and you will get refund if the reward ain't arrived on time.
Misty won't be able to help, if your reward have not yet arrived, then contact support, but one problem is that they have been inactive as of the moment