you have guarantee that your credit code can be used? yesterday just bought 1 code aws and cant redeem it it's said "Security Check characters are incorrect. Please try again."
Just post a screenshot of the page + error so i know you you are redeeming the code the right way & AWS is really giving you that error. (perhaps i made a mistake copy/pasting the code into selly.gg or something, i don't know)
This weekend i'm traveling, once back i will either give you a refund or give you a new code (& also add some new stock to selly.gg)