What is S.C.?
I apologize. I didn't go back to look at the price of the item; I just (mistakenly) assumed YSL was over $250.S.C. is signature confirmation, and is only required on items that cost $250+, but since yours was under $100, all you need is delivery confirmation.
Tutushopper is correct. The label they sent/send will have a delivery confirmation barcode and that's all you need.
As for getting the refund, once you see that d.c. shows delivery, you won't automatically get the refund. You can do one of a number of things.
1. you can contact the seller and let her know that now that she's received the item, please issue the refund.
2. You can contact ebay, let them know that the package was received by the seller and they'll release the funds.