Maybe your physician did not send the result to embassy. Check with them, if everything is alright then reapply with upfront medical and include medical sheet with the file this time
Dont worry, reach anytime, the process takes half an hour at most. They just collect your documents and money and give you a receipt with a tracking number. Thats all
They even have a booth inside for emergency photographs and photocopies
Calculate your points here - http://www.canadavisa.com/comprehensive-ranking-score-calculator.html
PR is possible without job, lowest points selected were 450
You do not need to spend so much money to study in Canada
Easy and cheap way - Apply for PR
Study at domestic rates
Moreover you might face a rejection as embassy will be concerned of your genuine intentions of studying again after 10 years
Even they do not require your marksheets as its college and university which requires them for admission purpose. But they still reject low marks applications??