Videocon Industries — videocon led tv complaint

Address:

New Delhi, Delhi, 110041

I purchased Videocon LED TV (Model: VMD 55 FH OZ FA, Serial No.[protected] from M/s New Berco Electronics (Regd.), A-1, Rajrani Market Najafgarh road, Uttam Nagar, New Delhi 110059 vide invoice no HO/17-18/3956, dated 11/06/2017, under extended warranty up to 10/06/2020.
On 3/12/2018, I logged a complaint for partially darkness in display to customer care no.[protected], with reference no. DEL/[protected] and response code: 21712. Following day i.e. 4/12/2018, Mr Sandeep (Mobile no. [protected]) from authorised service center (M/s Mukesh Electronics, B-235, Inder enclave - 2, Shani bazar road, Kirari, New Delhi 110086) visited onsite and reported lighting board fault and has to be replaced under warranty and charged us Rs 1300/- and I paid the same vide cash Memo receipt no. 311 dated 4/12/2018.
It has been 3 months and several follow-ups with service engineer and customer care, I have not seen any update and actions.