Nedbank

On the 26th of September I made a transaction on the banking app to pay my rent however the payment went through twice.I called nedbank immediately their lines were busy and the call kept cutting.I then got to work yesterday and called them again same thing this time it went through to the call center but kept cutting I then called again from a landline and they answered I explained what happened the agent told me I have to pay R250 to have the money reversed I refused because it is not my fault the payment went off twice I always make payments using the app and this is the first time this has happened.I got transferred to a team leader Thulile who told me she was going to escalate the matter further and she will get back to me.She then called me back around 4pm telling me it shows still pending so there is nothing they can do I'll need to wait till Monday bear in mind the money is out of my account and I checked this morning and it went through I cannot follow up with the people I transferred the money into because they're offices are closed they're called Vartrust.So my money is gone and Nedbank cannot help me and it's their apps fault I'm definitely considering switching banks because they are not assisting me in any way