They had emailed me back a week ago saying to submit order confirmation for faster processing using the track cash back link. They provided the link in the email.
I hadn't gotten time to submit it until today. Just used the link provided, specified the order number, date and order subtotal. After submitting they immediately added $69.44 cash back to my account
The message said "Samsung usually reports orders to us within a few days of the purchase date. Although they haven't reported your order yet, we're happy to get this cash back into your account now."
I'll take it, thanks Rakuten !!!