Reservation of two baby car seats

Hi,

I am from Macau and I will go to Jeju on 25-Sep with my family. I would like to reserve two baby car seats ([다이치] 듀웰시즌2올인원 (ISOFIX)) in our trip from 25-Sep 0830 to 1-Oct 1900 and details as following. Since I cannot do the registration successfully, hope I can reserve the car seats through this message. Please also tell me more about the reservation process and details. For example: what information should I provide? Or if you want me to do the reservation through your web-site, please tell me the process step by step in English because I cannot really understand Korean. Thank you.

Beside, can I have your email?

Regards,

Thomas