I checked your order that your curtain hanging type is Korea hooks type and we have delivered free Korea hooks come with your curtains.
If you use curtain track/rail, you just need put the hooks into each eyelet, so you can hang up the curtains.
If you use curtain rod, you need the rings which belong the part of curtain rod, they normally is standard and you can easy but them from many shop in SG such as ikea.
For our Korea hooks, they are standard can put into any normal curtain rod/rail/track's eyelets.
Pls free feel to contact me if you need more assistance.