Mobilekart.com — a combo of 64 gb and 128 gb memory card

I have purchased a combo of 64 gb and 128 gb memory card for rs 799 from mobilekart.com vide order no.17774. But both of the memory cards are defective. Loading memories on these cards getting automatically deleted. I have mailed a complaint to [protected]@mobilekart but no such address found by gmail.com. I have been cheated by mobilekart.com. Is there any way to get the refund?