First and for most, you need to put together some crucial evidence  to back your complaint: (a) an attested copy of the receipt showing the date of purchase, the model and the retailer from whom you have bought the machine.(b) job cards or  the  receipts of the service  center  (or the person attending to your complaint) to show the repeated complaints and  the repair  work  undertaken  (c) copies of letters, if any, that you have  written to the company  complaining  about the  defects in the machine. (d) If there are any brochures about the  product, extolling its virtues, keep them too-it would help you establish the fact that  the products was different from what was promised. In addition, if you can get an expert to certify to the defects ,  it would further strengthen your  case.
Once you have these papers, you can write out your complaint, explaining  briefly, the factors leading ti the complaint and the redress that you seek- a replacement or a  refund and also compensation for the harassment and hardship caused to you as a result of the defects. You can also ask for costs of litigation. You can name only the retailer or both the retailer and the manufacturer  as the opposite  parties. The complaint  has to be filed within two years from the day the cause of action  arose.
I would suggest that you first write a formal letter  to the retailer and the manufacturer,  explaining  the defects and the fact that if they fail to resolve the issue immediately and give  a new  replacement,  you  will be constrained to the consumer court. placement,  you  will be constrained to the consumer court. You can also point, the company only needs to give you a new replacement with a fresh warranty,  but if you go to the consumer court, they will have to spend on their lawyer and also pay you compensation and interest on the refund due to you.
If they are smart, they will replace  your machine immediately.
You can join up with other residents in your area or a consumer group, purchases  a  few more packets of sweets from the shop (be sure to collect the receipt) and check the weight of the boxes. If this proves that the shopkeeper is defrauding  customers ( that, if the boxes weight more then what is claimed), then get witnesses to sing  on a paper indicating the correct weight and file a complaint  before  the consumer court.  Here, you can not only seek compensation,punitive damages and cots of litigation, but also a  direction to the shopkeeper to credit to the amount of the Consumer welfare fund, the amount earned by defrauding customers during the past one year. ( this can be calculated on the basis of his sales).
In the case of Hotel Nyay Mandir  vs  Ishwar Lal Jinabhai   Desai (RP NO 550 of 2006, decided on  December 14,2010),  the highest consumer court upheld such  a  plea made by the complainat and directed a seller to pay Rs1,50,000 to the consumer  welfare fund and  also pay the consumer, Rs5,000 as compensation and  Rs1,000 as costs, besides refunding him Rs22 extra charged on a soft drink.
In addition, you should also lodge  a complaint with the controller,  Department  of   legal   Metro logy.