Welcome to the Community and thanks for your post!
Sorry for the problems you're having placing an order for broadband due to your address being updated. I see you mentioned that your services are with BT. As long as you have a working line with us we will be able to get your address details updated. When you send us over your details using the form below, please include the new address details as it appears on >> Royal Mail's website <<
Click on my username here >> RobbieMac << and you'll see our contact link underneath my profile picture.