What is the solution? I am also having this issue. I had an old BT account number and have recently returned to BT and been given a new one but when I log into myBT it sometimes logs me in with my new number and sometimes my old seemingly randomly and it won’t let me add discovery +
Solved! Go to Solution.
try billing team they should be able to help with removal of old account
https://www.bt.com/help/contact-bt/account-and-billing/broadband
Thank you