No help with Capitec mobile banking app

After upgrading to a new phone, Capitec bank in Tygervalley as well as N1 city, could not manage to get my mobile banking app to work again. After spending an hour at both of the branches the conclusion was that I should buy airtime, which I cant do on the contract that I have with Vodacom. This was confirmed with Vodacom on both occasions. It was also suggested that I get a new simcard in order for me to get the app, which is not an acceptable solution to me. Their IT department, which was phoned on both occasions, were not helpful at all. We spoke to 3 different operators who all agreed that it is because I don't have airtime on my phone. While I have a unlimited CONTRACT with unlimited airtime. Am I really the first person with a open contract that needs the banking app? If not, this problem was supposed to be sorted out a long time ago. After spending 2 hours in the bank with no solution I am a very disappointed costumer and the ridiculous solution that I need to put air time on my phone is unacceptable. This cannot be the first time someone upgraded their cell phone and need a new app. I cant make any payments because of this - is capitec going to pay the interest I am charged