A program that grants points for using Bing search, which users can redeem for gift cards, sweepstakes entries, or charitable donations.
Same problem.
Sent email with all supporting document (MS email confirmation to me, my online order, screen shots, etc.). After an initial case # assigned and an MS email to me that MS would look into it, MS no longer responded to multiple inquiries / emails for follow-up. I followed all the rules - signup, use of MS Edge, etc.
This is not a true scam, it is a legitimate MS offering, but MS is cheating customers then refusing responses to fix the missing $ credits.