Help with assigning of the Case, WO and WOT

[Abhijit Das7]

Hi Team,

Currently we have Group A which covers certain zip codes and whatever case, wo and WOT are created are assigned to Group A and to certain agent. we have requirement, we have 3 accounts which are also present in same zip codes which Group A covers.   

But now whenever any case, WO and WOT are created for these 3 accounts, then those should be assigned to Group B and to particular agent. Both group A and group B have overlapping zip code, it is because if on ZIP -56001 any case/WO/WOT is created it should assign to Group, but in same zip is any case/Wo/WOT is created for any of those 3 accounts it should be assigned to Group B.

What I am trying which is not working properly:
1. I added that particular agent (XYZ) as dedicated/preferred technician for these 3 accounts.
2. Plus, on:

group A I have added assign condition: 

Account is not Gillette Children #1

AND

Account is not Gillette Children #2

AND

Account is not Gillette Children #3

Group B I have added assign condition:

Account is Gillette Children #1

OR

Account is Gillette Children #2

OR

Account is Gillette Children #3

But when I am creating Case, it doesn't get assigned to any Assignment group. WO does get assigned to dispatch assignment group and WOT gets assigned to Group B but assigned to remains empty. When I click on magnifying glass on assigned to I see all the 3000 TSR (agent) which are present on instance in place of 5 TSRs present in Group B.

What should I do that Case, WO and WOT should get assigned to Group B and to one dedicated technician XYZ for example let's take Andrew Och.

Thanks in advance