earphones problem .Can it be fixed or have to buy new?

i have samsung galaxy y and got earphones with it . but now i cant hear sound in the left one which side has also got the controller, and the right (other one) is working good like before..... and i can also raise the volume with controller , that may means its too working But that left side's (which have controller) earplug is not bt i can hear a little sound when volume is raised SO I WANNA KNOW IF THEY CAN BE FIXED OR HAVE TO BUY NEW ...... cz may be theres problem in the wire above controller.... PLEASE HELP I LOVE THOSE EARPHONES.......