How can I get in touch with the Office of the President, or similar

I am trying to get in touch with the highest point of escalation that I can get to. I have been dealing with Telus reps for over 1 month now in regards to a win-back offer that I was promised. I have been billed incorrectly since day 1, and have been passed around by representatives stating they cannot provide me with "false promises" about getting my issues resolved. Because I set up automatic payments, I have already overpaid for my first bill, and now to add insult to injury, I am being charged for a line that I have NOT received a SIM card for (and of course, still incorrect pricing). I have never experienced such poor customer service.