Poor to Non Existent Service and Services

I have called iBurst 4 or 5 times today and left messages and as yet have had no response. I have also spent over 20 minutes on the phone trying to reach Technical Support. It is 1pm now. When I called in at 9.05 am I was told the Customer Service Manager was not in. I have left several messages since with Betsy. My iburst terminal was blocked on around the 27th April after I complained about being able to view a trade account which was not mine, for around R14,000. Thankfully, I was told this was not an amount I owed on my PREPAID account! However, access to my modem has as yet not been restored, as it should have been around Monday the 11th May 2015, after I physically went to iBurst so they could test my modem and confirm I was not typing in the incorrect details. I had already logged about 3 tickets with Technical, who had still not resolved the issue. I am still trying to ascertain whether this issue has been resolved. I have also sent two emails to iBurst and as yet have had no response. I think there are several issues here. Would iBurst please resolve the issue with my modem asap?