Internet keeps rebooting itself and no help has been done

I have been on two tech visits neither one of them help because I still have a rebooting problem with my Internet. I have talked to four different people that I cannot understand whatsoever on the on the tech support to troubleshoot my Wi-Fi any other that still reboot every time I’m at work and my brother is at home it reboot on him when he ain’t even doing nothing but watching YouTube videos on his phone and this is starting to [Edited: "Language"] that every time I come home to game this does not get fixed every time I talk to tech-support or two times I’ve had tech visits so does this does not get anyone within I’m giving you guys three weeks to get back to me to fix this problem to find out why my Internet keeps rebooting itself not to mention I would like to point out the fourth time I had a tech I had a tech support call. I literally could hear people of a girl and a dude laughing in the background with the Hispanic person that I was on the call with and every time he would mute his self before he would mute his self. I could hear them people laughing at me did not take that well so in other words, I am giving you guys within three weeks. If this does not get fixed within three weeks I am switching companies. I am tired of this happening. I am tired of coming home and is happening. I’m tired of being off work and it reboot itself, even when I’m just watching a movie or we’re just in literally our room doing absolutely nothing but just sitting there because this keeps happening