so write very personalized and passionate letter explaining the switch. tal about your history and whu want so badly to switch. talk about our passion and future plans. u went to Canada and left it . that's positive factor. u went to europe on exchange. that's positive. it shows that you are trustworthy person. VO looks for genuine and trustworthy students. . if u wanna study that so badly then prove that to VO. don't worry they are also humans. they will read your papers and see other information and decides if you actually trustworthy or not