Hey! I've had a Digital Ocean account for a while, though I have never used it (never created a droplet).
I recently got my 'GitHub Student Pack' that had a promo code, but sadly it won't work as the site says its fo...
Don't worry, I had the same problem when I got mine code.
You need to Contact Support (cloud.digitalocean.com/support/tickets) and they will add redeem that code for you :)