Dear laithhishanDear Naz76 you never visit Montreal or Canada ? You get Visa before or all your applied rejected ?
I have got multiple visa for Canada. My visa got approved in first try. They rejected my family visa. but once Quebec invited us for interview I submitted my family visa and after 3 rejections got them finally.
As earlier I said it’s very difficult to convince officer that u will come back.
Along with explanation letter u submit as many documents as possible like yr job or business and yr daily involvement in it.
Continuation letter from yr school, advance payment of their school fees.
Yr family ties in yr country like parents bro sis,
Try to address this issue in small but smart words. Don’t write very long letter Bcz officers don’t give enough time to each application.
Best of luck.