Rocket Kommerce Llp — Mobile replacment

Sir in the Mobile box Mi4i when i open and start its Its sim number 2 is not working I am still waiting after 20-24 days for exchange my product which slot2 not working No one is listing my complains from Xiaomi partner I also given my home address on 15th July 2015 when i complained its . My complains numbers are 363533 which is allotted by MI India tellcaller But they dont given proper reply Thanks Regards Gurjeet Beniwal