Hey can you point me in the direction of where you saw this contest, or a source of where this promotion was at? I have been doing some poking around backstage, and I have not found anything associated with this Promotion by this name. Just want to be sure of all information before I escalate this issue or anything else with regards to this.
There are many many third party promotions running that tie in with the Spotify service, rather difficult to be sure what is a legitimate one, and what might be nothing more than fraud or a scam to get personal information from Spotify users. So if you could please post as much information as possible about this "contest", this will go along way in maybe helping you trouble shoot why the code redemption is not working for you?