Panasonic — phone has on/off problem

Address:

New Delhi, Delhi

I have purchased panasonic eliga a2 3gb ram 16gb 28//12/2016. After 4 months it works only when charger is connected otherwise dead. I have deposited it authorised service centre the care point durga puri chowk durga mandir tel no. [protected]. They have kept it for 40 days and handed over to me. But after two days. It has same previous issue.
Then again it was deposited to same service station. After nearly 42 days i phone the servoce station. They have inform me that doa is made. They are not able to repair the phone even with charges. I return with phone on[protected]., but when i try again it does not start nor charging. It seems that service centre has tampered with phone. Some important parts they have taken out

Kindly help me to return the phone

Iqbal khan [protected]