Using 'My Account' will allow you to review your charges in more detail. You will then be in a better position discuss the costs with a Telus Representative to resolve your inquiry. You can review when various data or SMS were consumed, and compare that to your own use patterns. You may have downloaded some phone or App updates in the background.
This Neighbourhood is inhabited by customers, just like you. We have no insight to Telus business plans, and no connection to the internal workings of Telus. We volunteer to share knowledge about Telus products and services which we have gained by experience or surmise.