If you are really "torn" up by the responses, then see what you want to see and be happy at Brampton where you probably have a host of countrymen living near by who know little about aviation but will push you to being close to Toronto.
If you can't reach MFC on the phone then that should be an indication of their approach to communications. MFC has had good and bad management in the past. A lack of answering the phone is not a good sign.
If you call Harv's you get a very nice friendly lady who will answer all your questions or get someone who can. Everyone on this forum has told you how fortunate you would be at Harv's etc etc.
If you want to speak to "other students" then just get on the phone, call Harvs and they will have a room full of foreign students
most probably who speak your first language who you can speak with. Their instructors are generally former students so, that should tell you volumes about how supportive they are of foreign students etc.
They also have a lot of experience at understanding the immigration related questions which means the paperwork has to be done correctly. If it is not done correctly, exactly as it is required, it may need to be done all over again and that could cost you another six months and an exit from Canada for a while to deal with the problem.
Now, I'm not acquainted with the ops rules at Harv's but at other flight schools not far away, we instructed in a Cessna 172 down to -30C with the cowl covers installed, something you will probably see only in Canada.
Now, down at Brampton, where it hardly ever gets that cold in winter, you will see them shut down operations at a much warmer temp.
Other schools claim they fly when it gets cold but also shut down when it gets a bit chilly at -15.
If you are coming to Canada then keep an open mind to be taught how to fly in the cooler temperatures, like -30 and below.
After you start work in Canada, you will go from some really chilly place to another place where its only -40 and it will feel positively tropical by comparison.
You now have an incredible amount of very good information on the previous posts. Perhaps it is time for you to follow up on that information.