Here's how you can raise a dispute on the Fi app:

1. Tap on the 'Pay' section of the homepage

2. Tap 'All Transactions'

3. Choose the transaction against which you'd like to raise a dispute

4. Tap 'UPI Help / Get Help'

5. Tap 'Raise Dispute'

6. Answer a few questions related to the dispute

7. Tap 'Submit'

For any further queries, feel free to contact our customer care team via in-app chat support.