Safari — not replaced yet

Address: Bangalore, Karnataka, 562125

I brought safari laptop 35l bag from jayanagar d-mart on 13th august 2017 - within a 3 month its not working properly so i gave it to them 0n 23rd january -2018

I haven't received the replacement bag or refund money yet, they are not responding well, whenever i call they are telling monday ill give (Its almost 2 months)

Now some 3 weeks their numbers are in switch-off, i don't know whom to contact