This is perfect, now you have proof that something is wrong with their system! When you call on Monday, tell them to check their notes/call-log, and they will see you have called in multiple times to sign up for electronic delivery, and each time the rep tells you it's done, but the change doesn't stick.
Use that as evidence to get a refund for both THIS year, and 2013, since the same thing happened back then (you DID click all the right buttons on the website), and now you have proof that their system is messing up.