Flipkart - Wrong parts supplied

I have ordered Samsung Evo Plus with * grading memory card on Flipkart. But I have received the low-grade low-quality item in the same packet. I have placed an order on **.**.**** and received it on **.**.**. I had wait for ** days and received the wrong item. Moreover, its a cheating, that they put this item in the same ordered grade products packet. By mistake, I have to open it and some of my important details try to cut & copy to the card. But it can't able to do and seems to be lost. If I forget to recheck the product which inserted in my phone, it will be lost for me financially too. Even though they are agreed to return the product, I have lost my data and cheating is not acceptable. Kindly do the needful to make this stop and never ever they do it again with any other innocent people. I have rechecked it, they may be not.