Hey this isn't covered anywhere, at least not that I can see. But if you submit an overlay and it takes 500 csc, in the process of waiting to be accepted if I cancel during the process do I get the csc back?

yes, i believe you should be refunded if you cancel the submission.

Yeah I found out the hardway hha. I ended up canceling and fixing what I wanted, and when I didn't see the csc I just bought more. ;c Ah well. Lesson learned!

If you cancel or your overlay gets rejected you should get your CSC back. If you didn't then you should file a ticket and they can probably refund you