

This happened because your visa claim should have been ‘stolen card details/fraud’ but it was put through as ‘food not delivered’ instead. Either your card issuer didn’t understand what was needed, or else it was poorly described to them. And you can’t claim twice on the same transaction.
If you get stuck, ask for help. Explain what your thinking is, and how you plan to tackle things, and explain what help you need to solve your issue. If you get the job, your employer can work with you if they know you’ll ask for assistance when you need it - they expect to provide training or helpful oversight to any new starter. In the interview test, they are checking your basic knowledge, and also whether you are teachable.