I am having the same problem.
I first tried connecting my A7R2 to my wifi which is BT but that failed to work. I then managed to set up my iPhone as a personal hotspot and managed to get connected that way.
I try and buy Time Lapse. It asked me to register online my credit card details on a laptop so I did that.
Now I get to the final 'Confirm Purchase' screen on the A7R2 andI scroll down to a button that says 'Order & Pay'. Next to it there is a link to Cancel.
I click on the button that says 'Order & Pay' and the same screen reloads back to the top of the 'Confirm and Purchase' page