master account holder

So I have been with Vodacom for years and have been running multiple contracts with them. Recently my account was split and now all of a sudden I am no longer the master account holder on my own account. After several calls to the call centre, I get an SMS requesting me to send a copy of my ID - no indication as to where this should be send. My question is why ever should I be sending you another copy of my ID when you should already have four of them? Guess what will happen when my contract expires? That's right, I'm leaving you and your *********** service and taking my hard earned money elsewhere!