Telus doesn't usually do tree pruning themselves.
Years ago it was BC Hydro that did brushing on the lines for joint venture poles. If your power is on the same pole, and if the trees are not on your property, I'd suggest you contact Hydro. There is usually a plate on the pole identifying where it is and if it is joint venture.
If the lines are threatened by branches on your property, I would think the issue is best addressed by you.