Communication is the key to any good working relationship; your advisor is not clairvoyant! Let them know if your business needs alter or you have not understood the advice. It is reasonable to expect regular updates on your case files and a timely reply to your queries. If there is a problem with their service, you are entitled to complain. Often, concerns can be quickly resolved once raised. If this does not happen, you should ask to see details of their formal complaints procedure. Most complaints can be resolved before matters get this far.