I hope you are taking the name of every Orange employee you speak to, dates, times and outcomes. keep a copy of every expense you've encountered.
Write a letter to Orange, and send a copy of all the times you've spoken to someone, copies of all the bills of the expenses you've paid, and tell Orange you will seek legal action of you do not get a remedy within 14 days.
Keep a copy of the letter, do NOT send any originals to Orange, send only copies. Let me know of the result!