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So I clicked on the link for a free username change...and it's charging me 1,000 CSC
I'm pretty sure it doesn't actually charge you if you actually confirm it, it just says that by default. But you could always go back to the page with less than 1000 CSC on hand to make sure it goes through for free, and then if it gives you an error, file a ticket.
i'd say its a good idea on 's part, but its also a fault if its showing up as 1000 when its supposed to be 0 (pets with free name changes show up as 0 after all), especially since normal username changes are supposed to be 500! xDD

I tried and it just told me "Oh No! You don't have enough credits!" ;_;
Then you should file a ticket and they can fix it for you c: Ticket link
Pet name changes cost 500 CSC, usernames do cost 1000 c:
IS IT :C then how did i change my UN twice how rich was i ;0;

Unfortunately I don't have an answer for you but I do have a link and the page says 1000 I'm just here to read the page ma'am
Ahh I remember you. Welcome back <3! Good luck changing your name hope it's resolved quickly ;.;
Hahaha yes, it's been like 50 million years? Maybe. I remember you, too! You always had the best HAs and OCs! Hello, hello
Subeta Team was very fast in responding to my name change problem, but I accidentally wrecked my wardrobe and I'm just having all sorts of issues...My shops are gone? My face is gone? That's what I get for disappearing for 5 years.
have you read New Shop Guides?