First, all Fluz gift cards are non-refundable.
In the event that you were refunded to your Fluz Balance, you need to have reached the lifetime cashback minimum of $26 before you can withdraw your refund.
You have $24 lifetime cashback (from personal and network), you get a refund of $50. You are unable to withdraw any amount because you need to hit the $26 minimum lifetime cashback first, before you are able to withdraw. However, you can always use your FluzPay balance to purchase more gift cards through the app.
You've made withdrawals before, which means you've already hit the $26 requirement. You currently have $2 in your Fluzpay balance, and you get a refund of $4. You may withdraw any amount any time.