Xiaomi Logistics India — Need my money back: want refund

Address:	Bangalore Urban, Karnataka, 562106
Website:	www.mi.com/in

I purchased Mi4i 16GB worth Rs. 12999 on 17th Sept, 2015. Within a month the cell Phone got an issue with display (manufacturing default). So I submitted my Phone for repair/replacement in Mi service center( S.G. INFOTECH- Boriwali West Mumbai-92) on 12th Oct. 2015 and till now I had visited more then 3 times and every time the service center replies me that I'll get my Phone in or after next week and have not yet received my phone back. So how come I can trust this company, therefore I want my money back for which I purchased the Phone... So I kindly request YOU to contact me by mail or call. Contact me for all relevant documents
mail id- [protected]@rocketmail.com
contact no- [protected]