Hyundai TV — display is not working only audio is working

Our hyundai tv covers 5 years warranty and met with technical issue that only audio is coming from tv but video is not working. I have tried calling all the possible numbers for service/complaints but not a single phone number is working. Please help to repair it from company because it is still in warranty period and not able to reach hyundai tv company for help. Please contact me on abbas. [protected]@gmail.com