The primary OmniStudio role here is to display interactive data using FlexCards. The requirement is not just to show static transaction information; the card must present recent transactions in a branded UI and allow the agent to take action, such as disputing a transaction. FlexCards are designed to show contextual information and provide quick actions in a reusable declarative component. OmniScript would be appropriate for a guided multi-step dispute process, but the initial list display and direct action surface are FlexCard responsibilities. Tableau is for analytics and visualization, not transactional service actions. Apex may support custom logic, but it is not the primary declarative OmniStudio UI tool for this use case.

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