I am representing my son over 'unpaid business taxes'. There is an ongoing dispute over tax monies owed in two of fifteen tax years. The last thirteen years had refunds due but were held back over the first two years in dispute. My search revealed an accounting error in the first two years such that refunds were due there too. All the CRA late penalties absorbed most if not all of the refunds due. I appealed this explaining that there was never any taxes owed in any year, however, the appeal group has 'gone dark' and I have had no replies for months. What should I do?