Although the 'official' closing date for comments has passed you can still make your representation to WC.
As this application will be going to the Strategic Planning Committee, WC has to take into account all comments made upto when the item is actually debated by councillors. But, obviously, the sooner you make them, the better!
However, the facility to comment on the WC web site has been removed and so you must either write a letter or send an email to developmentmanagement@wiltshire.gov.uk quoting 16/00672 as the subject heading.