Step 2: Tap "Transit & Top-up Claims" (under "Card Services")
Step 3: Tap "Make a New Claim"
Step 4: Tap "Top-Up Related Claim"
Step 5: Enter/verify your details
Step 6: Select "eVoucher" and tap "Submit"
Step 7: Verify your contact details and tap "Next"
Step 8: Tap "Submit"
And you're done!