Myntra.com — wrong product delivered and claims that they're right

Website:

www.myntra.com

I have ordered for a jeans of size 32 and they sent me one of 30. (May be because that size 32 is not available in warehouse). And in turn, they say that they have sent the right product only to me while i call on customer service. They might have had technical glitches in their systems and they don't accept it. They're providing wrong information to customers and trying to fool us.