Indeed, contact customer service or your local headend. If they refuse to investigate or fail to repair within 3-5 days,
contact the FCC via this link.Excessively loud commercials are unlawful under the CALM Act. The regulations
were recently updated to bring commercial volume further in line with surrounding programming. WOW is required by law to investigate any trend or pattern of complaints.
Multiple commercials in the fashion you have described is a pattern which must be investigated and repaired. It is possible it's an equipment fault on a modulator, it's also possible their "partner" is deliberately violating CALM and they are unaware. They are not required to perform spot-checks and cannot be required to purchase equipment if they obtain a hardship waiver. But they are still held responsible and must repair or mitigate, or they will be considered to be in violation and subject to fines.