These issues began a few days ago, and is prevalent in all channels. We have two Netboxes, one upstairs and one down stairs, with both have identical issues. One of your customer service guys was helping me via texting/chatting earlier this evening, but we got cut off before we were done. Not fun.
What do you mean by poor picture quality? In this digital age, the picture is usually either "perfect" or not there (black screen). There is a very narrow band of signal strength that may produce pixellation of the picture. Call Rogers and have them check the signal in your home and neighbourhood. Here's a post on the topic of signal strength: