Professional Institute

As a member of a professional institute I had cause to submit a number of formal complaints against them.  The institute ( a limited company ) refused to address the complaints, giving the reason that it was their certification board that the complaints related to.  (Their certification board is legally part of the professional institute but has no legal standing of its own).  I attempted to address my complaints through their Certification Board who denied me access to their complaints process.  They subsequenlty (several months later) issued to me a retrospective complaints process which demanded payment from me in return for dealing with  my complaints.  They have refused to answer my questions in connection with why I was not allowed access to the existing complaints process.  In the meantime, they have withdrawn a number of services from me (they have confirmed this in writing) until such a time that I confirm in writing to them that there is no threat of legal action from me.  Despite the fact that they have withdrawn their services, they continue to take membership fees from me.  Is this a breach of contract by the Professional Institute?