Disappearing Telkom Data

I am on a Telkom data contract. Over the past two months, my data (10Gb) is depleted within two days each month. I have contacted their help desk, but they could not really assist me. I have logged onto the Telkom Comunity blog and notice that a large amount of Telkom users are experiencing the same problem. I have also tried to use the Chat function on their website, but the system is not working. I do have data contracts with other service providers which I uses on a daily basis that never gets depleted .