TV 65 inch hisense

I bought a tv 65 inch last year August 2020 last week while I was watching soccer there appears vertical stripes on the screen I sent it back to hifi Corp their supplier called me after a week telling me it's liquid damage when I asked if it's repairable they told me they will have to send it to someone who will check if it's its repairable leaving their technician behind I think they trying to give their friends business by robbing me remember it's still under warranty