What should I do if the stamps I have accumulated are missing? NTUC Link Give us a shout-out via the Plus! app "Contact Us" button under "Account" page. Related articles My deal/stamp card has expired. Can I still use them? What will happen if I delete and reinstall the Plus! App on my phone? What is the Plus! app about? My LinkPoints are not credited. What should I do? How will I be updated on special offers?