Mixed up matrix still rated the worst company to deal with

Despite their last hellopeter response that they have escalated the matter to Management for a comprehensive review of the queries raised by me, this is not true - once again they are demanding payment of the amount paid by me in March24 and sending threatening emails. The problem remains that there is no communication between Departments and they totally ignore customer correspondence to which I have had no reply on matters raised for 7 months! All they do is send different settlement letters with unreconciled amounts and threats. I say again do not deal with companies that have no administration.