We have put together a short survey to capture your feedback in terms of what BT can do when you experience home Wi-Fi issues. We would appreciate it if you could take a couple of minutes to complete a short survey. Read more from here, Fix my home Wi-Fi
I'm assuming you are on an Infinity service and not ordinary broadband. You could try unticking the VLAN box.
Yes. BT Infinity. That's not worked either. Error code back to IPC6023. Very frustrating! Any ideas?