When an alienated parent first realises he/she is going to lose contact with their children their feelings go from disbelief and despair through to anger, confusion and sometimes and all too often depression.
Having been there — and technically still being there — you might need to look after yourself more than anyone. Officialdom goes round and round and round and round expensively producing nothing but annoyance and a deep sense of injustice born out of real and horribly tangible actual injustice — all dressed up as ‘dealing with the matter’. It can be kafkaesque in terms of never getting to actually achieve anything at all. Do not fry yourself in the process; you are already in the frying pan of a system that exists to burn you.