Internet banking system sucks

I am very concerned with Nedbank's internet banking its a mess. Everything is slow does not update amounts correctly amounts take weeks to reflect and now money was removed for Prepaid airtime and it does not reflect on my phone. The airtime system has been down for about two weeks. Useless service provided by Nedbank. I cannot transfer funds to bank accounts its suppose to ask me to authorise from my cell phone I receive no such sms to authorise. What the hell is going on with your systems. I think u need to change your service provider because they have no clue how to maintain your systems. Resolve otherwise I am changing banks. Angry Customer.....