I had the same scenario. I gave spouses pssport copy marriage certificate copy with my signature and a letter from spouse saying that she has never landed in canada nor does she objects to me getting Oci.
I didnt try but call bls and ask them if u can make appointment under “visa” and drop off ur application. Its worth trying cuz purolator is ruining people already hit by pandemic
They should not be allowed to force us to buy service we dont want. Bls is open for appointment walk in since 22 march. I wish i tried harder to make an apppointment
For me link came quick within a minute. Clicking link opens new tab and they will ask for permission to open the camera u click on yes. Dont worry its all pretty smooth.