Welcome to the BT Community and thanks for posting!
I am sorry both yourself, and your friend, haven't received your rewards for signing up through the Refer a Friend offer.
When was your friends service activated? As per the terms of the offer, you need to be outside the 14 day cooling off period. You should both receive your rewards via email within 45 days of your Friend's broadband activation date.
See here for full info: BT Refer a Friend
We received an email from BT on 13/10/22 to say our friends account has been activated and we had successfully referred a friend. Bill's have been paid since.
We think the problem is the email address first used by our friend
I think we will need to look into this for you.
There are some details that I need before we can pick this up for you. The details you posted aren't what we need. I removed them from your post for you as it's public. I'll send you a private message with the details I need.
Hi @Peter172 Thanks for getting in touch with your details, the voucher team has made arrangements for the refer-a-friend claim to be processed and your vouchers will be emailed within the next 30 days.