If you have not received the Twitch Prime Pack content, there are a couple things to consider.
1. This content requires a Twitch Prime account.
If you only have a standard Twitch account linked to your Epic Games account, this content won't be available. The good news is that you are able to promote your Twitch Account to Twitch Prime using this link.
2. There was an issue with Twitch Prime Pack content on 02/28.
If you have a Twitch Prime account and attempted to redeem this content on that date, you may have encountered an error during the process. To resolve this, please use the Twitch Prime Pack redemption flow found on epicgames.com.
If you are still having problems with your Twitch Prime Pack after going through the above self-service options, please let us know!