iBall — negligence on device repairing

Address:

4 No Azadhind Nagar, 700109

I have given my laptop compbook m500 with serial number[protected] to the kolkata chandi chawk service centre inspirisys solution limited nearly 2 months ago. Everytime i tried to check with them, the rare moment when the service centre actually pick up my call, they said they haven't received the part required for repairing. They asked me to contact the service centre. So did i, more than once. The customer suppprt executive being unable to give any resolution told me to email the customer support, so did i twice, none of the time i get any reply from them. Now what, what else could i now do?