I'm already an account holder with BT (as of last month) and I want to upgrade from 10GB to unlimited usage.
When I go through the process of upgrading it seems to be treating it like a new order - asking all the same questions as it did the first time even though I'm logged in... and finally I get near the end and it says
"We see that you currently have broadband with another provider. All you need to do now is get your MAC (Migration Authority Code) from them in order to easily and quickly switch to BT Total Broadband."
Ummm... I'm not switching provider, I'm already with BT. Why would BT need a MAC code from itself to just upgrade my usage limit?
In the list of providers to choose from it doesn't give the option of 'I'm with BT already'... so...