Account type - Canada

Detailed description of problem:

Is there a way to track the calling credit consumption ? I have around 800$ a month of calling credit packages and I'd like to know where this comes from and how can I lower my bills.

The "usage info" section in my billing-ServicePlan page shows that I have 5,839 minutes of unlimited usage. On my bill I see the calling credit being automatically bought (which is fine).

Number of Users affected. 126