HG635 keeps dropping/rebooting

Hi
I am writing to you about my intermittent super router, Huawei HG635 that is randomly rebooting, My router randomly reboots, There is only power light on nothing else is working. Then after few minutes it starts working again and then off again. Its very frustrating. I stream on Twitch find this very frustrating it has killed my Stream several times this weekend, I have switched the router off and back on again, checked all the wires,changed the cables, even tried  2 other PC's, Could I have a replacement or a fix for this super router HG635 please.