Line suspension for no reason

paid my account on for December 2015 on the 24 and my debit order runs on the 30th because I was avoiding my account not being paid. On the 31st I called the call center because they still debited my account even though I had made payment. The agent told me to reverse the debited amount. I did so on the 5th of January 2016. On the 21 January at 08:17am my phone was suspended and the call center told me they escalated the matter and couldn't see why it was locked because the payment was made. It's been 3 days and my phone is still locked. I spoke to the call center manager in Durban Sheldon Dixon who knew nothing and just dropped my call after his team leaders had been dropping my calls and humming as I queried why my line was locked. Had to wait for hours to get these team leaders on the phone. I don't know what poppy huis they are playing there. Someone needs to teach them about customer service.