Intex Technologies — intex aqua s3

Dear Sir,
I have purchased one Intex Aqua S3 mobile on 19.03.2018 from Naveen Mobiles, Naidupaeta, Nellore district, AP-524126.
In April month it was got problem and I have given this mobile to shop person Mr. Naveen ([protected]). After 15 days he has given the same mobile with working condition.
Again it was got problem on August month and I have given to the same person. He kept the mobile 40 days with him and given back to me in the same condition. And told that it will not work.
On 19.03.2018 I have purchased this mobile by paying Rs. 5100/-. But I dint get any service with that mobile.
Invoice and mobile photo are attached for your reference.
As I am working in the multinational company, I would like to give good feedback to our colleagues.
Please look into the matter and kindly replace another mobile in place of this mobile.
Your prompt action is highly appreciated.
Thanks & Regards
Sandeep Konduru
[protected]