1. Make another appointment for B2(Visitor), Vancouver or where you are now, doesn't matter much. but better give a good reason why you apply in Vancouver this time, "I happen to be visiting a few friends here" doesn't sound convincing.
2. "I don't know why, decision was made in seconds" if they ask you.
3. If you have chance, tell them your future plan in Canada, i.e when your wife and kid will come, your current living place are cozy enough for the family, how you like to settle down in Vancouver...
4. Don't mention your interview.
5. Basically everyone has 50-50 chances getting visa, life is filled with unknown.
6. The officer was doing their job, they are not supposed to be nice, even they were, you would say "pretending nice" after rejected.
Good luck.
2. "I don't know why, decision was made in seconds" if they ask you.
3. If you have chance, tell them your future plan in Canada, i.e when your wife and kid will come, your current living place are cozy enough for the family, how you like to settle down in Vancouver...
4. Don't mention your interview.
5. Basically everyone has 50-50 chances getting visa, life is filled with unknown.
6. The officer was doing their job, they are not supposed to be nice, even they were, you would say "pretending nice" after rejected.
Good luck.