Ok, We have a very basic router that was supplied to us from our isp. We live at the end of a street and there is no possible chance that our network is interfereing with another network. Currently we have 9 devices connected to the router via wifi; no ethernet ports are being used. The router has decent speed when not all devices are using the internet but when 5 or 6 devices start being used the router becomes slow
Speedtest when not congested: 35ms ping, 10mbps down, 0.79mbps up
Speedtest when congested: 231ms ping, 2.34mbps down, 0.03mbps up