So I’m trying to redeem a code I haven’t used but when I enter the code it says “ Your card limit has been reached “ what am I supposed to do in this situation so I can use my code

Hello Cristian_m901! Thank you for participating in the Apple Support Communities.

We understand that you’re unable to redeem a Gift Card. We'd like to look into this with you to see how we can help. 

Apple provides the following resource to help with this issue, including a way to contact Apple Support to look into this issue further, if the steps provided in this article don’t help: If you can't redeem your Apple Gift Card or App Store & iTunes Gift Card

Make it a great day!