Independent TV — error 400 from a week

Address:

House No 211 Jawahar Nagar Tehsil Camp Panipat (Near AVON Public School, Panipat, Haryana, 132103

On the subject cited above hereby inform you to error 400 comes from a week on the tv screen and no any visit of any technical person from your head from a week. Lots of time we talk to your customer care persons and but no response at the site. Service request no is 2669232 which received on 2.4.19 and tentative resolution time is 24 hrs & today date is 10.4.19.
(Box s/n : [protected], mobile no. [protected])