It's between CIC and your lawyer. You can only use eCAS (online status check). To be honest, your application is pretty young yet. You can probably take queues from your lawyer as to when things should be submitted. Ultimately they will have the liability problem if it fails, due to communication problems. If you fail to meet a request, they will give a prescribed amount of time over and above the limit, and if you do not submit, they usually just send a procedural fairness letter to warn you that they are going to cancel the application, and if they still don't get the info, they cancel the application.
Without lawyers, they communicate by email or telephone (and myCIC) typically.