On line banking & App problems

I have now been cut off three times while speaking to a call centre operator and it is not at my end. What I am trying to find out is why I am getting the message "Browser needs to be verified" when I am using the same browser as usual. The online page tells me to use the FNB App but when I try and download it I get the message "pairing error - system currently not available". As FNB is always on about their fantastic digital system I am not impressed. Possibly my activating my new Credit Card has caused some sort of problem