No service delivery for ex Nashua mobile customer

I am still waiting to be reconnected after my second disconnection this week - I cannot get through to anyone at the call centre and neither could the lady assisting me at mtn Northgate . Last weekend when I was disconnected I was told to pay in R 1000 as there was a problem with ex Nashua mobile customers. This week however after my debit order went off as normal mtn owes me R 1000 and I have been once again disconnected. The branch cannot understand why this is the case and I can't get hold of customer service. I am a single mom with no other telephone - what happens if there is an emergency ? I now need to buy a pay as you go phone ( on Vodacom ) so that I can contact people despite having a contract with mtn that has not been defaulted on - from my side anyway. *** mtn - is this how customers are treated? Unacceptable.