Both WiFi and Ethernet are very slow

I am using an XB7 and I am paying for 1Gbps but I am averaging below 200Mbps on both WiFi and connected via Ethernet to the XB7. Any idea what I should change? The advanced tech called me today and said hold on a few minutes while he checks something and then he asked me if I had any ideas, seriously? When I was on the 600Mbps plan with an XB6 I was getting over 500 Mbps.