Are you able to continue with the courses at York, perhaps working toward a second degree? If you can assemble two good years in a row, there are schools in Canada that would only look at those 2 years - although you would have to double-check that those schools will accept marks from a second degree.
Unfortunately, I think adding some more time to your academic record is likely to be your only shot. I don't think any Canadian schools are likely to accept a C+ average, and you will need to add to show that your straight-A semester was not a fluke.
Best of luck in figuring out your journey,
If I'm understanding correctly from my email conversation with Allard, they won't calculate your current semester's classes as you are in your graduating year and the courses are still ongoing. So your GPA will remain at 79.666 when they evaluate your admission.