Calling Canadian Government, you will run out of time
I have 100 minutes on my plan but being on the phone with customer service is eating up my minutes. What will happen if I run out?
If you regularly use up the numbers, you may want to "pivot" to the $25 plan which is a great value and has unlimited across Canada talk.
if you're dead set on the $15 plan, you can add the $5 500 min add on as a blanket for when you run out of minutes, and the add on minutes roll over until they're used up.
I just tested down to the latest 833 (in Canada) and it doesn't hit the counter.
I wouldn't worry about it.
It is perhaps unofficial but at the moment it doesn't count.