Yeah I did the same thing, but if you enter the same code on that bungie.net/redeem page there will be a popup with some blue text that is acually a link to your destiny profile /redemtion page (seems like theres no other way to get to that page BTW) and under the headline Destiny2 there will be the system verification link. Hope this helps.

Did you check your profile under codes? They won't send the download code to you directly.