Unfortunately, it is not possible to get a refund on a redeemed Free Fire code. Once a code has been redeemed, it cannot be undone. This is because the code is linked to your account and cannot be transferred to another account.

If you are not satisfied with the reward that you received from a redeemed code, you can try contacting Garena customer support. However, they may not be able to help you get a refund.

Here are some tips to avoid getting a redeemed Free Fire code that you are not satisfied with:

• Only redeem codes from trusted sources. There are many scams out there, so it is important to be careful where you get your codes from.
• Read the terms and conditions of the code before you redeem it. This will help you understand what you are getting and if there are any restrictions.
• Be aware of the expiration date of the code. Some codes expire after a certain period of time.

If you do get a redeemed Free Fire code that you are not satisfied with, you can try to trade it with another player. There are many online forums and communities where you can trade codes.

I hope this helps.