both seem to be valid ways of sending webform
https://secure.cic.gc.ca/enquiries-renseignements/canada-case-cas-eng.aspx
https://www.canada.ca/en/immigration-refugees-citizenship/corporate/contact-ircc/web-form.html
It takes 15 days as the average time, but if yours is January intake, then you had to submit the visa by Dec 4, did you check with your admission advisor?