No network service since December 2023

Till today i have been waiting for your techbicians to sort me out with an external router. This has been for 3 weeks now. I called 2 times today and waited for more than 25 minutes while your support team is rebooting their system. I have been struggling with the network since December and no one is comong to my rescue. What do i need to do now? Who i need to speak to?