I'm so sorry you're having trouble. Let's see if we can get your issue resolved.

To restore your Just Ahead purchases: 

1) Open Just Ahead

2) Tap on Find a Guide

3) Tap on Manage Purchases (note: you'll have to scroll down to find the button)

4) Tap the Restore button

5) You will be prompted for your Apple or Google password, enter it

6) After a few seconds any guides you have purchased from Apple or Google will appear on the screen

Once your purchases are restored you can now download and play your guides:

1) Tap the back button to return to the main screen

2) Tap Play a Guide, here you'll see a list of guides installed on your phone. To open the guide tap on the guide and follow the directions. 

3) If the guide is not there Tap on Find a Guide, then tap on the guide you want to download, then either purchase the guide by tapping on the price or download the sample by pressing download sample.