Mitashi — under warranty replacement/repairing issue

I have bought mitashi led tv on 16 october 2015 in which company has provided me 3 years warranty in diwali offer. My led tv is not working since 18 sep 2018 i have complaint for that in 19 sep 2018. My led tv is in mitashi authorized service center since 4 months but till today i.E 25-01-19 my tv could not be repaired when i mail/call to mitashi head office lucknow ([protected]) for replacement my old tv as it could not be repaired they always told be that your parts are coming and your tv will be delevered to you within week. It is being done from last 4 months.
Please help me in this regard
my contact no is [protected]
my complaint no is [protected] complaint dt[protected]
my mail id is [protected]@gmail.Com