No service

On 26 January some mtn agent called me asking if I want to upgrade. He explained the package and I said yes. SO I HAVE 2 PHONES ON ONE CONTRACT. I always upgrade at a shop and do both phones at on the same time. Big was the suprise when I received a call on the 25th Febr asking if I want to upgrade. I said but I did last month. No he said that was just for 1 phone and not even my primary phone. Then they said I must email my ID which in January wasnt the case. Then the call was ended without giving me an email address where I can send it. So on Friday 26th I phoned explain the whole story without help and today the 1st March the same story. I've send emails, phoned a couple of times. Just no one is willing or able to help. Even my bill is a mess this month as a result of the upgrade. I WAS BILLED FOR THE PREVIOUS MONTH, WHICH WAS PAID.... AGAIN.