TELUS - SmartHome Security

Had telus replace ADT. New install included doorbell video. Since install 4 months ago, we kept hearing a buzzing noise, but could never pin down the cause. Finally found it was coming from the doorbell unit mounted up high on the wall. Internet search finds possible cause is an underpowered transformer in the doorbell unit. Telus installer had muttered something about having to return to replace a transformer, but made no mention of when, why, and the effect of not replacing the part. Needless to say, nothing has been done. Another example of the Telus bushleague approach to customer service; they can't seem to be able to do anything on my behalf without fouling it up.