Phone blacklisted without reporting it ******

One of my numbers started with no service on Thursday 11th Jan. After numerous attempts by Vodacom to synchronise the sim they tell me on Sunday 14th the phone is blacklisted. They cannot tell me who, when or why. This is a business phone and totally unacceptable. This is an error by a Vodacom employee. Why should it become my problem to run around with affidavits etc to sort out. Reference number: 1- ********** ********** . It has now been escalated twice and still no service. Totally unacceptable behaviour by the supplier. Every single person and email says "we will get back to you in 24hrs" Absolute ******* as it never happens