Apple India — Iphone 5s handset issues

Address: Mumbai City, Maharashtra, 400050

Website: www.apple.com/in

I purchased my iphone 5s in july and since then facing issues . in the previous month i gave it to maple dti at santacruz mumbai three times, for a week and above, and got back my handset with same issues . a brand new phone with less than 6 months o[censored]sage being sent and returned back with no action or software job done and facing same issues of rebooting and various display colours . phone been taken away for a week with no spare phone given even when asked for .
iphone serial number- DX3RV931FRC5

maple dti job no -
1.KHR[protected]
2.KHR[protected]
3.KHR[protected]