The telephone number 01563 763121 is being used as part of a BT telephone scam, as per a report on Twitter on the 29th September 2020.
@bt_uk just received a call from +441563763121 claiming to be BT telling me there are some issues with my internet & wanted me to connect my laptop to my WiFi just thought you should be aware I don’t even have BT internet !
— chris sheehan (@1originalchris) September 29, 2020