Lack of sim card activation

A new business contract was placed with Vodacom in April on a IPhone - They later confirmed that tis phone is no longer in sock and we need to select an alternative. This happened 2 times. The 3rd time the said again that the phone is not available and that the process must start over - in the mean time the phone arrived, with a sim card (+/-17 May) To date the sim is not activated - after requesting this many times from Vodacom. No response is received on mails sent