Even I have received the Logitech Wireless Combo. But it is MK220 (http://www.logitech.com/en-in/product/wireless-combo-mk220) and not the one shown in the promo page - http://www.logitech.com/en-in/product/wireless-combo-mk520
Promo page - http://deals.ebay.in/newyeardelight/
The price difference between the two is significant.
Can you please confirm the model you have received.
If a seller would send an item different from the one listed then eBay doesn't spare. And here eBay itself is cheating.