English Grammar

Besides, I have taken LCCI Higher and intermediate level of account examinations, and both examinations have got pass with credit.

若你說『passed』;己代表你『taken』的意思，account的意思是戶口/帳戶而非會計，應寫為Accounting，還有兩個考試的名稱的大小草都應一樣。
Besides, I have passed both LCCI Higher and Intermediate Level of Accounting examinations with credits.

I needed to provide various services to our customers and take charge to organize birthday parties for children.
如你已說了要提供不同服務予客人，那末，為小孩安排生日派對，便是其中一項而沒有並行的意思了。
I needed to provide various services to our customers, including organizing birthday parties for children/their children.

I am looking forward to hearing from you.
本身是文法正確，但為免看上去或讀起來clumsy，通常都袛會寫look...
I look forward to hearing from you.

Hopefully I may help you (:

I think it's not quite correct for you to say so on the second line,
"and both examinations have got pass with credit"
Since the examinations can't have got pass with credit, you should change the sentence into
"and both examinations have been got pass with credit"
to show YOU have got pass with credit in BOTH EXAMINATIONS, but not BOTH EXAMINATIONS have got pass with credit.



Approximately, the grammar throughout the passage is acceptable. I hope to help solve you inquiry!=]