9+ years with Videotron, and adding Helix TV has been a nightmare

We moved service addresses around the time Helix launched, and because it was new, we were aggressively pushed to switch over to Helix internet when there were limited TV bundles available. Now, we are trying to add Helix TV services, but after three separate calls with customer service and a visit to a Videotron kiosk, no one is able to offer anything close to the promotional bundle pricing seen on Videotron.com or with Bell. To make matters worse, one phone rep changed the plan and added Helix TV at an unagreed price, failed to reverse it, and promised a callback that never happened. Calling back meant dealing with reps who couldn't understand the previous notes or honor the intended deal. After 9+ years with Videotron, this is the worst customer experience yet, and management would be embarrassed if they pulled the call recordings. Has anyone had a similar problem, or more importantly, successfully added TV and built a bundle around an existing Helix internet account?