Useless

I am on the Ultimate package from Fnb connect and after going to bed having 3500+ min on my phone I woke up to a SMS at 5am in the morning saying that I have now depleted all my minutes and sitting on a negative balance of - 283! How is this possible? 3500 min equates to 58 hours on the phone and it supposedly happened in less then 8 hrsCalled the call center twice now to no avail. All they have to say is we have escalated it to the admin department? Now I have to pay out of bundle rates till they sorted their ****! Get a grip guys! Or you might just get a notice with the intent to cancel my banking and phone service both personal and business!