Thank you for your fast reply. Unfortunately, the bag I want has already sold out.. after considering, I think it will be better for me to take the bag you have already sent to me rather than I have to pack it again and send back. in that case, because the price is ¥2980, can you refund ¥2000 (because I paid ¥4980) to my account? After refund I will consider this case closed.
Hope there will be no mistake like this again in the future. And thank you very much for the response.