I use Westnet however the lowest plan they now have is $15 and you get $200 of free calls per month. Don't think they could make money on people like me! I don't use it often enough -I guess they rely on you going over the limit but as I prefer SMS or email, I don't use phones much.
Canada is reported to have some of the most expensive cellular service in the world. I pay $65 dollars a month for unlimited calls across Canada, unlimited text and 3 gigs of data, all on a 3 year contract. This is a new plan for me and significantly cheaper than my previous plan.
I get free calls to both mobile and land lines after 6.00 p.m. to 6.00 a.m. on my prepaid plan with data thrown in which I rarely use for $30.00/month which rolls over the unused credit each month. When it gets too high I transfer some over to my grandchildren as it saves their mother topping up and suits me as well.