Amzon offers - Duplicate damaged memory card received

i was searching for memory card on google search engine on ** july, ****.
i got www.amzonoffers.com.
they offered me samsung ** gb & ** gb @ Rs ***/-.
i ordered for cash on delivery. order number ***************
on ** july, ****, i received order through shipment ********* of ecom express (contact call centre @ ***-******** ).
when i opened the bag, i found * memory cards of ** & ** gb of samsung make ( these cards looking duplicate at first sight).
i inserted cards in mobile phone one by one.
both of cards didn't work.
i also tried in computer system, but no response.
finally i called the company's contact number ***********, but it was engaged. i tried whole day, but it was either busy or switch off.
i tried to complain through website. i filled formal form provided by website www.amzonoffers.com, but no reference number received at their end.


thanks,
sataypal singh (**********)
satpal_savita***@hotmail.com