Who is responsible for setting rates and ensuring that adequate service is provided by my utility company?

 The Public Service Commission is charge, by law, with the responsibility to set rates and ensure that adequate service is provided by New York's utilities.

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About the Public Service Commission
The Public Service Commission has a broad mandate to ensure that all New Yorkers have access to affordable and reliable utility service.
URL: http://www3.dps.ny.gov/W/PSCWeb.nsf/All/180FE1412ED8012F85257687006F3935?OpenDocument

 The Public Service Commission is responsible for setting rates and ensuring that all New York State Consumers have adequate service provided by New York's utilities.

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Directory of Offices within the Public Service Commission
Brief description of all offices that comprise the New York State Public Service Commission
URL: http://www.dps.ny.gov/directory.htm