R24 000 BILL

i have 3 cell-phone accounts and 2 datanet line accounts all under my one of 3 cell numbers. The main one is for business. I receive a statement monthly but only access it at the end of the month when due to pay. The one datanet line was not working in December and also in January . I phone through on Monday to query this and was told all ok, would reset and should work. Nothing so phone on Tuesday and spoke to someone in Technical who told me was cut off on 26 December because of the enormous bill. My average bill of R5800 is over R24 000!!!!!! BECAUSE of usage in December!. She would get the credit controller to contact me. No call and phone 2 nights ago to request a detailed report which would take 2-24 hrs to get to me and I would be charged for it which I accepted. Now Friday - no report and no call from the credit-controller. Payment is due by 31st otherwise will get cut off. Have been on the phone for over an hour today and still waiting for someone to pick up. Firstly, bad service respond and secondly no ways am I being billed so much!!!!