Setting up multiple users to take calls

We have been told by RingCentral several times that our call queue is complex. Is there anyone with RingCentral that can take a look at the backend to make sure we have everything set up correctly? We seem to be missing calls and VM's, and nobody's phone rings. We also have a landline phone that we have yet to have someone help us connect to the system. Any insight on how to get a rep to work with your account?