NOT RECEIVING STMT - SERVICE CUT AFTER PMT MADE

for the last four months I am not receiving my statements via email as usual, after numerous complaints at Vodacom online chat and the accounts department I am still not receiving my statements & invoices. After a 4 hour struggle every month I sometimes get a statement otherwise payment is made by guessing the amount due. Also every month by the 15th my service is cut even though my payment is up to date. so I pay for something that I am not getting. Also the customer care Centre is completely *********** and unable to assist 9 out of 10 times that I phone. This is why I cancelled two out of three of my Vodacom contracts. and if this problem continues I will have no choice but to cancel my final contract with them as well. Can anybody competent please assist.