Hi
I logged into my CIC account and clicked the option to link an application. From there I did the following:
Category: Temp resident
Sub category: Work permit & extension
UCI & Family name
Place of birth
Type of work permit: Open
Marital status: Common-law
Situation that applies to applicant: Applied for permanent residency as a spouse or common-law partner in Canada.
I had been trying everyday for a week but glad it finally worked today. Good luck!