Xiaomi India — Redmi note 3 not working within 22 days from date of purchasing

Address:

Pune, Maharashtra, 411004

I have purchase redmi note 3 online on 1st june 16, i have received handset on 3rd june handset worked properly only for next 22 days only, after that it's battery not getting charged, that instrument was not working, i have submitted handset to service center they told me that charging port is not working have to replace the same, after that after huge follow up on 22nd july 16, they have returned me handset and they have told me your handset problem has been fixed now handset is working, that handset worked only for 1 day after that same problem is appeared now i have again handset submitted to service center they told me spare parts are not available,
Please help me i have purchase that handset on credit card emi, i have paying emi's bank but due to faulty handset xiaomi india has sold me, please look into the matter,