Writing Project B

Good afternoon miss :)
I would like to give opinion about grammatical errors.

1. Past perfect
Novi had written her job to makes some business plan, she must bring it to the director tommorow morning as soon as possible.
 - Novi had written her job to make some business plans, she must bring it to the director tomorrow morning as soon as possible.
Fauzy had sent me a email before he called me yesterday.
 - Fauzy had sent me an email before he called me yesterday. (An is used before a vowel (a, e, i, etc).

2. Present continous
Don't go anywhere! Our office boy is making some glass of coffe for us.
 - Don't go anywhere! Our office boy is making some glasses of coffe for us.

3. Past tense
This product was expired, you have to saw the labels before you bought it.
   - This product was expired, you have to see the labels before you bought it. (after to-  must use V1).