The visa officer might just have been in a bad mood.
Is your relative employed or otherwise a participant in a volunteer program, sports program, social program, studies or any other activity that they can get a letter stating they were residing in Canada? Or even a letter from their doctor or dentist stating when they have visited them and that they were in Canada at that point. You should get that from your relative and send that to the visa officer stating that your relatives wife refuses to give you any information but you do have this proof by letter that your relative is residing in Canada.
Is your relative employed or otherwise a participant in a volunteer program, sports program, social program, studies or any other activity that they can get a letter stating they were residing in Canada? Or even a letter from their doctor or dentist stating when they have visited them and that they were in Canada at that point. You should get that from your relative and send that to the visa officer stating that your relatives wife refuses to give you any information but you do have this proof by letter that your relative is residing in Canada.