In this world, there are all kinds of people, so parents don't return your credit card, probably because they think it's easier for you to make money and they can spend with peace of mind.

If you don't want them to use it, you can apply for a credit card to report the loss and get a new one.

Of course, if parents really have any financial difficulties, you can still help if you have the ability. After all, parents have the grace to raise us.