Can't view invoice on website

I cannot view my invoice at directv.com.  When I try to, it says that I need to go to att.com.  When I go to att.com, it says that I need to go to directv.com.  I just get sent back and forth between the 2 websites.  I have been able to access my invoices online for years, but have not been able to for the past several months.  

I have called directv customer service several times over the past 3-4 months and spoken to countless representatives in different departments and no one has been able to help me.  I have been told that they are looking into it and that they will call me back.  Also have been told that there is a system upgrade that is happening, but this should not take over 3 months to happen.

I have asked for paper copies, since I like to review my bills every month, but I would prefer to view them online and save a tree.

Does anyone else have this problem?

It has been beyond frustrating and makes me want to switch my TV service.