Thanks for your post and welcome back!
Sorry for the problems you're having setting up Smart Talk. You should be able to download the Smart Talk app more or less straight away, you don't have to wait 21 days to download it again.
As you have been speaking with numerous people and you're still no further forward we will look into this for you from here to understand why you're having a hard time setting it up again.
Click on my username here >> RobbieMac << and you'll see our contact link underneath my profile picture.