求助英语高手帮我看一下这段有没有语法错误,是否通顺.

总的来说还是不错,个别地方错误,
for改成as
whose改成where
中间一整句有问题,我修改了
am pm后面要加"."(点)
修改后如下：
Our company,Ken J,is located in the centre of the city as a cell company will make its greatest profit in the most prosperous district.It is on the first floor of a mall where rent is high.The company has a hall amid small offices for our employees allowing customers to choose the mobile phones they like.The address of the company is No.15 Wingston Street and you are sincerely welcome here,no matter as a customer or as an employee.Our company opens from 9 am.to 5 pm.on workdays and from 8 am.to 7 pm.on weekends.

写的有点罗嗦哦：Our company-Ken J is located in the most prosperous district of the city for a cell company ，which will make its greatest profit. It is on the first floor of a mall whose rent is high， and it ...