Can you please remember which date you placed your order, as there were a number of different offers running in November?
Check your email confirmation from BT, to get the date.
I have asked a moderator to provide assistance, they will post an invite on this thread.
They are the only BT employees on this forum, and are based in the UK.
Welcome to the community and thank you for posting. I'm sorry you've haven't received your M&S voucher as part of your offer for signing up to BT. If you send me your details, I'll be able to help you with this.
I have sent you a private message with instructions on how to contact me. You can access your messages via the envelope icon at the top right of the screen, or click on this link, Private messages