Changing EMail Address

[First King]

I am having difficulty changing my EMail address on PubG ! BT are making their disposable EMail addresses obsolete so I need a new one.

When I tried changing my password, I was sent a new one by EMail, but I can't choose my own !

[Aqualung]

I am having difficulty changing my EMail address on PubG ! BT are making their disposable EMail addresses obsolete so I need a new one.

When I tried changing my password, I was sent a new one by EMail, but I can't choose my own !

You haven't explained yourself very well. Assuming you can log into PUG with your new password then from the home page there is a link on the right called "Your Control Panel". If you click on that you will see an option to "Set Personal Details" and after clicking that an option to "Change my password".
Does this solve your problem?