Shaw reps: questions about internet packages

There are 3 packages in the broadband 100 tier: broadband 100: 500GB monthly cap, broadband 100+: 750GB monthly cap, unlimited 100: unlimited My questions are as follows: 1. Suppose I have broadband 100, and I consistently go over the monthly cap, what would happen? After my ignoring Shaw's warnings, would I be automatically upgraded to either broadband 100+ or unlimited 100 depending on my usage? 2. Suppose that I was automatically upgraded from broadband 100 to broadband 100+ due to consistently breaching the 500GB cap, and for the ensuing month my usage falls below 500GB, would I then be automatically downgraded to the original broadband 100 that I singed for? TIA.