If a person finds themselves in a financial transaction that involves injustice, they should take the following steps:

1. Seek Clarification: Understand the terms and conditions of the transaction thoroughly.
2. Consult an Expert: Reach out to a knowledgeable individual or legal expert, particularly someone familiar with Islamic finance, for advice.
3. Negotiate Fair Terms: Try to renegotiate the terms to ensure fairness and justice.
4. Seek Legal Recourse: If necessary, consider legal action to resolve the injustice.
5. Avoid Similar Situations: Learn from the experience to avoid similar unjust transactions in the future.

It’s also advisable to consult an Islamic scholar for guidance on adhering to Islamic principles.