Blocking of lines every night

<p>Since the 6th of April Vodacom blocks all lines on my contract every noght after 8 due to a programming error on their side. The reason they provide is that a credit limit bar has been activated which is not the fact. I have visited vodashop Moffet on Main twice with no success. I went to the head office in Port Elizabeth. They looked into my problem without success. Several service request have been locked with Vodacom, no solution. I stay on a farm and this is my only means of contact since we don't have landlines. My son is a student and needs the wifi router and ipad for his studies. The call centre does not take my calls since I have reached my quota of calls for the month!!! I pay for a service that I do not receive. What can I do to resolve this problem. </p>