DIRECTV Account combined will with Century Link.

I have a combined bill with CenturyLink and Directv.  The Directv account number they have on my bill is a 10 digit account number.  This number doesn't work.  How am I able to access my Directv account, create a password, and use other services (ie Directv on Demand, ESPN apps, FoxSports apps).  This is very frustrating and I keep getting bounced back and forth between CenturyLink and Directv and can't get an answer.