ANR changed to IMO - Help!

I have an Att account that has 9 lines on it. The new IMO account allows employees of certain suppliers to get up to 5 lines at 57% off. I was only able to get one online for $8 off. I would like to add the other 4 lines to enjoy that discount. I have been working on time since May. Today, I have called at least 7 people at AT&T.  I don't know who else to call.