Need help? Check out Spotify Answers for solutions to a wide range of topics.
Hey there @itztsunami,
Thanks for posting about this here in the Community!
First, we'd recommend making sure that you are an eligible user in the US or UK and haven't had Premium (or a trial) in the past.
If you are and you're still having troubles, could you give the following a try on a different device (preferable desktop) and/or network connection:
If the issue persists, it'd be helpful if you could share a screenshot of the error message you see when trying to redeem it - just make sure that there's no private/sensitive info displayed.
Let us know how you get on! We'll be right here if you need more help.
Have a lovely day 🙂