Data share option no working

Hi,<br> <br> I have linked 2 number to my contract and the data share worked perfectly until around a month ago. It stopped working and has used up all my airtime on the 2 number I was sharing data on. This is unacceptable and ****************. When activating a service it should stay activated. This number 1<br> <br> Number 2: You invoicing system does not work I haven't received any invoice for this month because it says the system is undergoing maintenance.<br> <br> Number 3: Contract zone where I am suppose to re link my data share does not work...<br> <br> Please can you contact me immediately I have been an mtn client for over 8 years, but I will move at the end of my contract if service levels don't improve...<br> <br> Thank you<br> <br>