Xfinity Techs Fail to Fix Issue Time and Time Again

Ive had 2 Technicians come out for the same issue and they've still failed to resolve the issue contacted for. Ive been losing connection to WiFi for over a year now due to high packet loss and slow signal.Both techs that came out tested the tap from the Junction Box right outside my home, and showed me the interference detected on their tablet and gave me a new Gateway which clearly doesnt fix anything. Ive been getting multiple text messages throughout the week for months now that theyre working on maintenance in my area to fix issues but have never seen an Xfinity Van anywhere near my neighborhood and the issue still persists! Ive even went out and purchased an Xfi Pod despite me qualifying for a free pod through Xfi Complete which was never received. If this is the level of service you guys offer to long term customers id like to cancel service right away.