Stuck in an unresolvable circle :(

Lost my banking app credentials.

Attempted to reset it online, kept getting the error message: "No data returned from request"

Emailed FNB, they told me to phone them.

Phoned them, and they told me to do it on the website.

I can't keep going around in a circle that doesn't solve the problem. Please can FNB call me to resolve this issue.