DISAPPEARING MTN DATA AND AIRTIME... MTN back at it again

I woke up with a zero balance for my airtime and zero balance for my data that was loaded in less than 2 days ago. I called the call centre which wasn't helpful at all, as they either told me its my background apps, which is not the case and she transferred me to the wrong team to assist me. That team then further sent me to another team that told me I need to get a certified affidavit in order to get a URL account. Really so I must run around inconvenienced while MTN takes my airtime. I then later on recharged with a certain amount, when I checked my balance less than a minute after re-charging, it was R30 less and I hadn't made a call and my phone is connected to wifi. My airtime as I write continues to decrease voluntarily whilst I'm connected to wifi...