two story house extension plus attic

I'm doing a two story extension and the external part of my attic (internal will be done at a later date). Originally we had an architect but now we have a problem. He's not answering our calls or text messages and he still has not given us a elevation plan or other plans after that. we are working off the plan in the beginning Right now we are at the stage of putting the beams up and we really need the architect for this . Is there anything you can do to help us out please