if you've purchased this pack already, go to your 'my library' page and you should see the 'BB Emotes' pack and hit the 'Download' button. you should be able to download the 'RAR' file, which requires 'WinRAR' on PC, but since you're on mobile, you can download the 'Unzip' app on iOS App Store or 'RAR' by RARLAB in the Play Store for Android. once extracted, you should get the instructions in the text file inside the RAR file you extracted.