請幫忙翻成英文,急~

However, I have to confirm that my bank account has such amount, then I will ship this product to you.

我唔用But, 而用However, 因為正式的英文是有規定, but 唔會放前面 (不過, email 可用)

另外, 我唔知你是否因工作關係, 用到以上英文, 我做過跟單(merchandiser), 會用以上的方法來寫...

I will send out the package as soon as my bank confirms your payment.

但,我必定要確認到我的銀行帳戶內有該款項,我才會把東西寄出.
However, I have to make sure the amount is received before I ship the goods.

However, I have to ensure my bank account has got that amount of deposit before sending out the item.

But sorry, I must sure there's a sum of money in my bank account, then I will mail the "thing" (該物品).

But I should check my bank account have enough money,after that,I will send it.