Rediff Online Shopping — invalid customer care number

Address:

Kolkata, West Bengal

My complaint is against rediff online shopping. I purchased a chinese light sewing machine from their site in August 2013. The machine stopped working in its 2nd use itself. I tried to call on their toll free number, but it is invalid. I even e-mailed on their customer care forum, but there is no reply. Now what can I do? Please help.