To manage the security of your profile on Qwil, contact lists are dictated by Contact Groups. Client users will only be able to see other users within their contact groups. Staff users will only see clients they are contact groups with.
If you cannot see users that you believe you should be in contact with, there are a number of options. As a User Administrator or System Administrator, you will be able to go to the administration tab and navigate to Contact Groups. From here you can go to the relevant group and add yourself.
As a Staff User or Client User, you will not see the administration tab. Therefore you should contact your organisation administrators and ask them to add you to the correct groups.