Consumer Redressal

I have purchased a l ton Blue Star split AC from M/s. MG Electronics, Baguiati, KOlkata 700059 in 23.02.2013. I have requested the proprietor of MG Electronics that to please advice me which model of AC is best for such a small income group family like me. They insisted me to purchase a Blue Star model NO.3HW 12T B1. But after two years this year the AC found defective and three local AC mechanic on inspecting the said AC found there is leakage and bad AC given by the Shopkeeper to me. They also informed us that the proprietor of the MG Electronics sold me a bad quality out dated AC to me. On taking up the matter with MG Electronics they said they had no idea about the bad quality of this AC and advised me that they have left no alternative but to change the internal machinery of the AC at the cost of Rs.8500/-. Sir,I have informed the shopkeeper that then I have to take up the matter with consumer forum but the proprietor showed don't care attitude. Please save us from such loss.