Here are some details about how to redress complaints through Consumer Forums in India. Also see the guidelines for filing a complaint. These bits of info have been compiled by Alok Saigal.
If you have any more suggestions or information then please do drop us a line.

Consumer Complaint Redressal

Complaints can be filed at:

	Name of the forum	Jurisdiction
A	If the loss suffered is upto Rs. 5 lakhs (5,00,000/-)
1	President, District Forum no. 1 Room no 158 Western Wing 1st Floor, Tis Hazari New Delhi - 110 054	Cases pertaining to territorial jurisdiction of Police Stations falling within North-east, Central and North-west police district.
2	President, District Forum no. 2 C 22/23 Udyog Sadan Institutional Area Behind Qutab Hotel Mehrauli New Delhi	Cases pertaining to territorial jurisdiction of Police Stations falling within West, South-west, South and New Delhi police districts.
B	If loss suffered is between Rs. 5 lakhs (5,00,000/-) to Rs. 20 lakhs (20,00,000/-)
	President, State Commission Room no 2 & 3 Old Civil Supplies Building Tis Hazari New Delhi-110 054
You may prefer an appeal before the State Commission against the order passed by the District Forum.
You are not required to pay any court fee or engage a counsel to present your case before these forums/commissions. You can present your case yourself.

Guidelines

Major points that must be remembered while filing Consumer Complaints under the Consumer Protection Act.

Before submission of the complaint, collect all relevant documents which would enable you to establish the veracity of your complaint.
Before submitting the complaint to consumer court, it might be worthwhile to write a letter preferably under registered A.D cover to the "other party" conveying to them substance of the complaint and asking them for rectification, giving them a period of about 15 days for such rectification.
Mere letter to the consumer court will not do. A regular complaint has to be submitted.
It will be for you to determine whether you need the assistance of a lawyer to prepare the complaint and pursue it in court. This may perhaps not be necessary: you may yourself be able to meet the requirements.
The complaint should be typed. It should contain complete and full presentation of the entire case including mention of any letters which may have been sent to the "other party" and replies received. Photocopies of all relevant documents will need to be attached to the complaint.
Six copies of the complaint along with photocopies of the documents, are normally required to be submitted to the consumer court. Submission of the complaint should be made either in person or through registered A.D cover.
Normally the court would issue notice to the "other party" on receipt of the complaint, giving 30 days time for submission of reply. Next date of appearance will depend on the number of cases pending in the court.
The complaint should contain specification of the loss or damage caused to the complainant, and on that basis it should contain demand for remedy of the defect/replacement of the product as well as award of appropriate compensation. It will be for the complainant to specify the amount of compensation demanded giving reasons and justification for the demand.
If the complaint relates to any goods which are considered hazardous to life, the complainant can request issue of order directing that the "other party" should not offer such goods for sale and should withdraw the goods already placed in the market.
An affidavit should accompany the complaint wherein it should be specifically stated that the contents of the complaint are true and correct to the knowledge of the complainant and also that accompanying copies of the documents are true copies.