TV pixelation and poor reception

At least five Xfinity customers in our subdivision are experiencing constant TV pixelation and poor reception. The problem has been occurring for more than two weeks. We have already reported the problem to Xfinity and were told that the matter would be escalated, but no one has contacted us and the problem continues. Because multiple homes are experiencing the same problem, this appears to be a neighborhood signal, line, amplifier, tap, or outside-plant issue rather than an individual television or cable-box problem. I am asking that this be escalated to a supervisor and to the technical team responsible for investigating neighborhood/outside-plant signal quality. Please provide: 1. The escalation or trouble-ticket number; 2. Confirmation that the problem is being investigated as a neighborhood issue; 3. The date a qualified technician will check the signal/noise levels serving our subdivision; and 4. A contact person or department responsible for following up. This has gone on long enough. We need the underlying signal problem identified and repaired rather than having individual customers repeatedly troubleshoot their equipment.