please check and correct the sentence

[Anonymous]

Hi Teacher,

Though it is a foolish thing, please correct me .Hope you will certainly help me .

1.Since for a long time,there is no information from your side.
2.I want to discuss few things about my career and also about my future to you.
3.I would like to inform you that,since two years i am in China.
4.I do not know to which address you have been sending my mails.
5.Last two days i tried to reach you on your mobile.
6.Since i am not subscribing your magazine for past two months,kindly cancel my subscription.
7.It would be greatful, if you can find any other alternative for my problem.
8.Please do the needful at the earliest and let me know once u have done with that.

Thanks in advance

[Rusty]

1. For a long time, there has been no information from your side.
(Including since would make this a clause and the sentence would be incomplete. I have removed since to make a complete sentence).
2.I want to discuss a few things about my career and also about my future with you.
3.I would like to inform you that, since two years i am in China.
(Since is the wrong word. Here are two possible options:
...for the past two years I have been in China.
...for (the next) two years I will be in China.
...it is two years since I have been in China. I left China in 2002).
4.I do not know to which address you have been sending my mail. (Mail is usually a collective noun (a class or group of things).
5.For the last two days I have been trying/tried to reach you on your mobile.
6.Since I have not been subscribing to /have not subscribed to your magazine for past two months, kindly cancel my subscription.
7.I would be grateful if you can find any other alternative for my problem.
8.Please do what is needed at the earliest/ as early as possible and let me know once you have done that.