Some of the government and consumer organisation websites where one can lodge consumer complaints in India are:
http://www.cag.gov.in/
http://www.cai-india.org/
http://www.cccindia.net/
http://www.cercindia.org/
http://www.cgsiindia.org/
http://www.confonet.nic.in/
http://www.consumercomplaints.in/
http://www.consumerhelpline.in/
http://www.consumeronline.org/
http://www.consumer-voice.in/
http://www.corecentre.co.in/
http://www.icrpc.org/
http://www.iepf.gov.in/
http://www.investorhelpline.in/
http://www.irda.gov.in/
http://www.karmayog.org/
http://www.ncdrc.nic.in/
http://www.pgportal.gov.in/
http://investor.sebi.gov.in/
https://secweb.rbi.org.in/BO/compltindex.htm
http://www.cai-india.org/
http://www.cccindia.net/
http://www.cercindia.org/
http://www.cgsiindia.org/
http://www.confonet.nic.in/
http://www.consumercomplaints.in/
http://www.consumerhelpline.in/
http://www.consumeronline.org/
http://www.consumer-voice.in/
http://www.corecentre.co.in/
http://www.icrpc.org/
http://www.iepf.gov.in/
http://www.investorhelpline.in/
http://www.irda.gov.in/
http://www.karmayog.org/
http://www.ncdrc.nic.in/
http://www.pgportal.gov.in/
http://investor.sebi.gov.in/
https://secweb.rbi.org.in/BO/compltindex.htm
This list is courtesy of Shri Mohan Siroya of Consumer Complaints Cell.
Please inform what have been your experiences with these or any other website or institutional mechanism, to cccell@hotmail.com with a cc to us at info@karmayog.org