So I finally found a custom wearable I wanted to buy, bought the CSC, and went to the shop. It's 700 credits and I have more than that. I enter my password for verification but each time it keeps saying incorrect password. I've checked whether caps is on, even changed my password and logged back in. No luck.

What am I doing wrong?

Ah, you don't put in your own password. You have to message the user who is selling the CW item and ask them for the password to buy it from their CW shop. It's a special password that is created by them, not your account password.

I knew it was something I missed! Thank you so much. <3