Xiaomi India — Prize related

Address:	Gurgaon, Haryana, 122004
Website:	Www.mi.com

I won mi max in poster making which held on xiaomi india official website i am also having screenshot of the which pop up on website when i won the mi max phone i waited for 2-3 days but haven't received any call or email regarding the prize i checked there facebook page on which some other people who also won mi max they posted comments on xiaomi facebook that they won mi max and received there coupan codes to purchase mi max free of cost after that i contacted xiaomi through phone call but i didn't received any reply than i contacted through email than they replied we submitted your complaint and you receive confirmation from our relevant team than i waited for there reply but didn't get any reply again i contacted they replied same thing i contacted through chat they replied we don't know about you have to contact us through email when i contact through email they reply same answer you will get confirmation soon i told them please tell me time how much time you will they said we can't tell you exact time please wait this happened again and again for almost one month and still i am waiting for there confirmation if anybody knows what to do to resolve this issue than please guide me