D6400 Don't know how to connect to new BT Fibre to premisses
18 months ago I was helped step by step over the telephone to set this up to work with Talk Talk Broadband. It has worked very well. I have now changed to BT Fibre to the premisses, and want to change the BT home hub for my own Netgear router. The genie gets so far then says Incorrect ISP Username or Password. I'm not even sure what this is or where to find it. Can anyone help me please?