MTN is faceless and employ incompetant staff

I upgraded my cell phone contract with MTN on 5 August 2013. On 8 August 2013 I received a SMS from MTN, stating that my data on the contract is depleted and that my account has escalated to R 3 500.00. I did not update any software or download anything from the web during this 3 days. I registered queries to MTN's Customer Care Centre, MTN's main Branch in Bloemfontein, MTN's technical department in Bloemfontein and the Innovation Centre in Johannesburg, but still none of MTN's staff could sort out my problem. Even when my phone was turned of, data was used on my account. My account escalated to over R 50 000.00 and still MTN did nothing about the problem, except for cutting my line. My account limit was set at R 10 000.00 Only after I asked for a sim swap, did the data usage stop and my account stabilised. The matter was referred to the ombudsman in January 2014, but to date, nor the ombudsman or MTN attended to my problem. My only conclusion of the matter is that nobody at MTN takes responsibility or accountability for queries referred to them. Managers and supervisors are hiding behind *********** staff and can not be reached by customers. I will never refer anybody to MTN.