My old phone has died, I have changed my number. I went onto BF, but the moment I changed it they closed my account!!
Emails were bounced back, the message service said I had 2 accounts and shut me down.....wtf!!
It turns out that when BF bought Blue Square, they migrated my Blue Square account across and opened a 2nd account for me without me realising!
This was 2013. Today they decided to ban me when I changed my phone number
After faffing around they eventually closed that additional account
All good?.......NO......because I changed my number, but they closed the account before I could set up 2-step authentification, I was now locked out

Thank god for being a PC payer. It allowed me to get it resolved
I wonder how many other people have an additional BF account without them realising, from when they bought Blue Square?