Lack of service and passing the buck

I am going to try and keep this as short as possible. Phoned Business upgrade department on 20 April 2015 to upgrade and migrate two of my business lines. Upgrade was generated and processed on the 20th of April 2015. I was advised that Vodacom did not have stock of the Samsung J1, which I had no problem with, what was more important to me at the time was that the migration (to a cheaper package) was done. I received the handsets a couple of days later. On the 1st of May I check my account so I could action payment to Vodacom, only to find out that the migration never took place. Again on the phone Vodacom, got a reference no to confirm that they will look into the migration issue. During May 2015 received a sms confirming migration to take place end of May 2015. Again got on the phone with Vodacom to advise then that I am not happy with the migration date, as the upgrade was done and processed on the 20th of April. Again a reference no. Now, another mobile number is elligable for an upgrade, so I contact Vodacom. Now I am told I cannot upgrade because my account has not been paid, and the more I try to explain the reason...Please please somebody just phone me!!!