Lenovo — complaint against service center and after purchase service

Address:

Kolkata, West Bengal, 700074

To
Lenevo/respected sir

I have purchased lenovo k6 note in the month of nov 2017, but in the month of april 18 suddenly touch is not working in below portion. I have visited in salt lake service center on 13th april 18 but they deny to take this mobile under warranty because there they found slight scratches in body. But there was no broken parts and they asked me 4300/- for repair. I return back my phone and want to howrah service center but they found in system that this gazette is not under warranty because salt lake service center block my warranty period. All together i have been harassed by service center. Till now they are not ready to give me warranty facility due to slight scratches in my mobile set. As i have lost my father on jan 18 so i am going severe financial problem. Kindly help.