Application number is not mandatory buddy. you can also link using your last name and DOB.
Just check with that option. Not all can link as per what I have seen people posting.
But, if it is a offline application and not applied via consultant / immigration lawyer, you should be able to link it to cic easily.
Once you give last name and dob, it will search and tell if any application is found , asks if you want to link it.
Just chose "Yes" and it links. After that you can see application's status - not other details as your application itself ( as it is submitted offline, cic will not upload those details ).