英文翻译“我不知道又向韩国购买了一批”

I bought a batch from korea again because of I didn't know sth. in detail.

I don't know that bought again from Korea.

I don't know we've made another deal with Korea.

I did not know has purchased one batch to South Korea

I didn't know another buy from korea

I didn't know that another batch was bought from Krea.

i did not know that had purchased another passel.