Re: What does it mean when they say "BT or KCOM"?
Does that mean "provisioned over", or must you (e.g.) switch to BT before you can complain? If so, isn't that anti-competitive?
It means that only openreach and KCOM have signed up to the deal but in principal that covers every property in the country anyway, and most ISPs. So, no, there should be no need for anyone to change ISPs to take advantage of this.
However I think they can consider other technologies when deciding whether to help you or not. If so then this won't apply to properties that have access to other CPs such as VM. Openreach can just tell you to sign up for their service instead.