Consumer Redressal

I have purchased Nokia Handset for my wife (Model 225) from Manisha Electronics - Opp. Post Office, Station Road, Kalyan (W) vide their bill no 1892 dated 06/05/15 for Rs. 3,450/- Unfortunately, I was dissatisfied for the following reason(s): I am dissatisfied with the product as i got defective product. The Nokia Handset which i have purchased has problem of volume when i visit to Nokia Service Centre - Kalyan (W) customer care executive explained me that there is one spare part missing (net on the top) due to which problem accrued. Now dealer is saying he will get this repaired but i am not comfortable to repair new brand piece hence i request him to give me replacement piece instead of repairing but he refused to do so