HTC India — I am feeling bad with htc mobile set & brand (htc desire 628)

Address:

Darjeeling, West Bengal, 734001

On 05/07/16 i had purchase a htc desire 628 dual sim.
Imei 1 - [protected]
Imei 2 - [protected]
Device serial no: hq65abt51622
Wi-fi mac address: 80:7a:bf:70:b5:52

After one month almost the mobile is automatically shutdown in any time.
Most pathetic is battery capacity. battery capacity is most worst ever i had seen in my life. after full charge maximum two to three our capacity to use properly, most poor and worst mobile set in world i had. really i am shocked after 15000/- almost price how htc like company giving this kind of device where as others mobile company is more better i felt now. really i cant believe that almost i cheated by international brand. i don't know what should i do, even i am so much disappointed that i am not ready to move any near service centre also, within in a 30days why should i go for a repairing set use?