Lack of Service from our account manager & team

Over the last 8-10 months the service from our account manager and her 'team'has been disgusting<br> I ask for things and get ignored, this has been happening now since September last year we are trying to get to the bottom of accounts that are duplicated and also why they are active on 2 networks amongst other things, even something simple as the invoice cannot be actioned<br> <br> I need someone to address this as my CIO is ready to take this further <br> <br> ALL I WANT IS SOME SERVICE