Sai Systems & Solutions — No service providing from last 4 month

Address:

Amravati, Maharashtra, 444606

I had submit my mobile samsung e7 on 2 july 2016. job sheet no. is [protected].
Reff no. [protected]. after 20 to 25 days told that your device is not repairable so company will refund your full payment. but you need to submit ur document like photo id, cancelled cheque abd bank passbook photo copy. so i submitted all document. but till now no response from ur side.
What happned and what is issus for all this matter