You must have agreed to the terms and conditions when signing up for the card right? Now’s the time to put that into action:
https://www.instarem.com/policy/Amaze-MC-Consumer-Cardholders-TCs.pdf
Edit: If you're the type who hates reading comprehension tasks, I can help you. In short, the important points are
1. This card is a debit card.
2. This card doesn't require top-ups, but you have to link it to a third party debit / credit card.
3. You can't make cash withdrawals.
4. MCCs are passed through, so if AXS payments (MCC 9399) / GrabPay top-ups (MCC 6540) don't get points / cashback with your credit card, using Amaze won't change that.
5. There are rebates for using the card on top of any cashback / points you get from your underlying credit card, somebody has shared details a few posts erlier.