Sure, no issues with applying next week so long as you address the refusal reasons. Do research on that Montreal/Toronto itinerary, including transportation options to really show the officer it is a tourist visit.We're planning to apply next week again. Is it too early ) ? We could write that we have changed our minds and wanted to visit Montreal and Toronto in two weeks.
This rejected visa is really annoying! Every time when I apply to visa, I'll remember these bad days.
Thanks a lot