[Translation from Japanese to English ] I am glad to hear that you received the item. I apologize you. I could ...

Original text

商品が、無事に届いて安心しました。

すいません。

その不具合は確認出来ませんでした。

あなたの望むように50ユーロ返金させて頂きます。

ご迷惑をおかけして本当にごめんなさい。

Translation / English

I am glad to hear that you received the item.

I apologize you.

I could not confirm that failure.

I will refund you 50 euro following your request.

I am very sorry to have caused you inconvenience.

Translation / English

I am so relieved that you have received the item safely.

I am sorry.

I couldn't recognized the failure.

As you wish, I will refund 50 euros.

I am so sorry for what happened.

Translation / English

I'm glad you've got the item you ordered.
I'm sorry that I didn't check the problem you pointed out.
I'd like to refund €50 for it as you hope.
I deeply apologize for all the trouble you had.