MTS / Sistema Shyam TeleServices [SSTL] — MTS Activation issues

Address:	Chennai, Tamil Nadu, 600042
Website:	www.mtsindia.in

I have ordered for a MTS device on 22nd January and you gave me a confirmation that I will receive the device and it will get activated on Saturday afternoon.
After several follow up I have received the device on monday.
Still now it has not been activated. I dont want to use it anymore.
Since it was purchased online, just guide me on how and where to return the device.
This purchase was made for an emergency issue and its been more than a week. Finally I got another Wifi dongle and a SIM which was activated on the same day.
Since this device is purchased online, even MTS customer care could not guide how to return\surrender the device. They are curious on just activating my device.