MTN's poor customer service

<p>I upgraded my MTN contract in March, to my increasing regret. I have been a loyal customer for 14 years. In April, when my data depleted, it immediately wiped out over R100 worth of airtime. I logged in a query on 22 April. This morning when my data ran out, it wiped out R46 of airtime again. When I called customer care, the reference is still open. Now I am left without a proper working handset and use my phone for work purposes. To note, when I got my contract, I ensured that the auto update function is off and have restricted background data. I don't use many apps either. I dont understand what's going on and the customer service agents I have dealt with are clueless. Has anyone else been experiencing such issues?</p>