Yes, I cannot upload the documents they asked for, in my CIC account.
I have checked the "view submitted documents" page but in my case it shows the same documents that I submitted along with my application and there is no additional document link where I can upload my other documents.
So, I have already sent my documents through email and case specific inquiry web form. Now, I will fax the documents tomorrow. That is the last option I guess. I am hoping to see an update from them after all this.