OnePlus - Screen not getting repaired

I had bought one plus tv ** Y on Feb **, **** for INR ***** and screen has got broken.

My issues:
a. over and above screen cost of ****, they charging **** of logistics and **** as service charge
b. My first complain raised in July, their technician is suggesting to get it repaired outside stating, company charges a lot
c. i have escalated this matter to one plus but no response
d. i have asked for replacement for more than a *.* months, however, no update from them
e. when i call call centre, my complain no is open but no action
f. no update on msg or mail with respect my request
g. no escalation matrix for such issues