please modify this urgent letter

Hello,

The following is a letter of request from a woman, to get the money her husband was to get before his death.

can you please rewrite this letter in official english.
[Please don't worry about th addresses and other formalities. It's just the body of the letter I am concerned]

Dear sir,

I would like to bring to your kind notice that my husband, on account of his sudden death, never received the 6 month's salary due to him [ from march 15th to september15th]

It would be a great help if you could help me get these money, for which act of yours I shall be ever obliged

Dear Sir,

I would like to bring to your notice that my husband, on upon his sudden passing, has never received the 6 month's salary due to him for his work from March 15th to September 15th.

It would be a great help to me if the money was given to me. I will be greatly obliged to your consideration.