So it's been a week with the Router and from yesterday the router 5G light us Red and when moved to the window sometimes goes Amber

So it's been a week with the Router and from yesterday the router 5G light us Red and when moved to the window sometimes goes Amber. The connection is very bad as I cannot connect for more than 5 minutes and we only use 4 devices. I have called them over 10 times, had a chat on Facebook plus WhatsApp but no one gets back to me. They were quick to sign me over but no support whatsoever