How to UNLINK my Wireless Services & my DirecTVSTREAM services at www.att.com/acctmgmt/ ?

I want to UNLINK my wireless services AND my DirecTVSTREAM services at www.att.com/acctmgmt/ .   There are not links or instructions on how to do this AND there are no people available in Wireless Mobility Services or Combined Billing or DirecTV Billing that can assist. People just keep sending me back and forth to 800-288-2020 and 877-999-1085.  Escallation to next level support has not been of assistance.   Mobility Tech says this is a DirecTV problem, but they don't seem to know how to do it.

HELP !!!!!