On wireless, when I did a speed test on wired it went upto 78. Getting lots of lagging on xbox games but when I connect to my other provider I've got no lagging at all
Could you access your router using http://192.168.0.1/ or http://192.168.100.1 for modem mode . You shouldn't need log in, select the 'Check Router Status' option and paste your 'Downstream', 'Upstream', and 'Network Log' tabs? Please copy/paste this data as text, split between multiple posts (Sometimes you have to click 'Post' twice due to an error message).
Could you please create a BQM (Broadband Quality Monitor) here, and post the live link?