Xfinity turned off our HD service again with no explanation

This morning we discovered, once again, for the second time in two weeks Xfinity turned off our access to HD channels. This despite your repeated assurances over the past month and a half that our tier of service includes HD, specifically the Seattle Mariners channel. When we tried sending follow ups to our previous email exchanges with your customer service representatives, we received messages informing us that our case was "closed." We left a phone message for the "Escalation Specialist" we dealt with two weeks ago, but received no reply. We feel like Xfinity is gas lighting us. You gave us a modest credit on one month's bill because of the previous incident, but here we are again. We filed a complaint with the Washington Attorney General's customer resource system today because of this extremely poor service!