They insist not and tell me it's a multicast problem. I'm unconvinced, as the date of the problems starting coincided with the "EE" rebrand
BT are forever breaking stuff.
When we were with BT for our FTTP Broadband our MyBT page never worked worked, we couldn't even look at our bill, we had to rely on the emails, upgrades / renewal etc was always done over the phone and were always better than what was shown on their products section.
While BT are still our Phone provider, I haven't really check that section since we moved to a different broadband provider.
I remember when a home was being renovated near me and a crane broke our fibre cable, BT asked me to connect the Smart Hub up so they could do tests and they were insistent that they were able to connect to the Hub even though the fibre cable was coiled up in our garden by the CSP Box.
So not all staff members know what they are doing, so I wouldn't be surprised if that was the case this time with your issue.
But give them time and if no joy within 7 to 10 working day then phone them back up and explain the issue, but keep calm and not have a go at them.
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Paul