Can you please check my grammar?
It sounds good, normal?
Good morning, I’m a subscriber of a magazine, I have a 12 months subscription started in September but I haven’t received yet the issue of November, do you know something about that?

Question

Can you please check my grammar? 
It sounds good, normal?
Good morning, I’m a subscriber of a magazine, I have a 12 months subscription started in September but  I haven’t received yet the issue of November, do you know something about that?

Answer

This is more something for the Notebook section, I think. It's hard to give corrections here on the Answers page. But here is a more natural sounding version...

Good morning, I’m a subscriber to your magazine. I have a 12 month subscription which started in September, but I haven’t yet received the November issue. Can you assist me with this problem?

Answer

Can you check my grammar,please?Does it sound natural?