The business contact information shown on the back of the pass is taken from the details you added when you first registered with Loopy Loyalty.
You can change these details from the settings page in the Loopy Loyalty dashboard.
First navigate to the settings page using the 'cog' icon on the side menu from the dashboard, or using the drop at the top right of the pass.
Edit any details that need to be changed, click the update button when finished.
For the change to be shown on your stamp cards, you need to save the stamp card and push the update. This needs to be done for all cards.
Enter the edit stamp card page and click on 'Save', then 'Update all Cards'