FNB App not working and litte help from call centre

I urgently need help getting into my accounts. Cannot get into my app or my bank account. Need to do urgent payments. Online service centre says it is my internet provider - but I am trying to connect via Afrihost, Cell C and my Telkom mobile data on both my phones. None is working. Internet and cell phone data working for WA and Google. Need to make urgent procurements for business and do not have access to CVC number on vitual card. Please give me a solution. Telling me it is the signal on my side is not good enough.