How to change my files from spouse to common-law partner

[Catems]

Hi everybody,
After I finished all my application ( for my spouse and daughter ) someone told me that they will refuse my application because I wasn’t physically present at the day of marriage ( my uncle singed in place of me because I cannot enter my country because of the war there )
But after the marriage was registered in my country I lived with my spouse more than 14 months in another country and we have daughter!!!

He advised me to change my application to common-law partner

Now if this is the case who can I change all my files to common-law partner
Please guide me ?

HI we are on the samee situation have change it already? and how to change it?