The state Better Business Bureau is in Wallingford. For information, call 203-269-2700 or visit online at ct.bbb.org. You may file a complaint online at bbb.org or ct.bbb.org or call for information. Also, there’s the Connecticut Department of Consumer Protection hotline at 800-842-2649 or visit ct.gov/dcp. It will also accept written complaints, which can be mailed to 165 Capitol Avenue, Hartford, 06106.