We are a team of designers and developers with expertise and experience in Web designing, HTML, CSS, PHP, AJAX, JQuery, XML, Wordpress, Bootstrap, CodeIgniter and MySql. We have developed many custom sites and applications of varied extents and complexity.
I have read your requirements and am confident of delivering well. I understand that the customer "making an order" and "getting an order number" is already there. We just need to create the "Check status" page. Uploading a csv with the data will work (xls poses some problems). We will provide the format in which the csv should be uploaded. We will need to create the tables in the database that will be updated when a csv is uploaded. We understand that an admin section is already there and csv file uploading needs to be integrated with it.
I will need FTP and database access to your site. I ensure a very thorough job and support if you need changes / enhancements in future. I look forward to hearing from you and working on the project.