How to write letter?

Hi, naujanel. You had better try to do it yourself and we help you to correct it with great pleasure.

ok! tnx..

Dear....

Sub: SIM Card

With reference to the above subject, please find enclosed the Etisalat SIM card (no.) that we are using in Cargo Terminal Building Site Office which is not needed in our site anymore.

Hence, kindly do the necessary action regarding the above.

Thank you.

naujanelok! tnx..

Dear..

Sub: SIM Card

With reference to the above subject, please find enclosed the Etisalat SIM card (no.) that we are using in Cargo Terminal Building Site Office because we have no need in that on our site anymore.

Hence, kindly do the necessary action regarding the above.

Thank you.

"Hence, kindly do the necessary action regarding the above."

This is not natural in American business English. Is that natural where you are? Will the person know what the necessary action is?

Grammar Geek"Hence, kindly do the necessary action regarding the above."

Grammar Geek ,tell me, please.
Is it necessary to include that in the letter?

I can't answer that. I don't know the circumstances. I don't know the culture of such phrases where the original poster lives.

Here, we'd say something like "Please let me know if there is any other information I need to provide or actions I need to take" or something like that.

Thank you, GG.

That's why I'm asking your help coz I dont know how to write.

We don't know what the cultural situation is where you live.
I've seen many letters written by people in India that include "Kindlly do the needful." If that was written in an American English business letter, it would be met with laughter. On the other hand, the abrupt style of American business English could easily be seen as rude and curt in Indian English. So we can help with grammar, but