Transit visa canada (for parents travelling from India)



My parents are travelling from India to attend my wedding in Jamaica.(there is no direct flight from India to Jamaica without stopping in either canada or USA ) Unfortunately they got rejected in their B1/B2 visa for USA. I did some research and found out that Canadian transit visa is very easy and approval is within 10 days. Can anyone help in getting me the link/Procedure. I always end up in VFS site with no option to select transit.

If there is any other easy way … I am open for that as well.

Thanks a lot!