FNB - Service Failure - Account closure.

My wife no longer requires her FNB account and has made numerous attempts to cancel the account. She has made a few attempts to contact her private banker but has been informed that they are no longer with FNB. My wife then made contact via the FNB application with no luck. She then tired a number of times to call FNB and unfortunately the account is still open and FNB are charging for the account. This has been going on for a number of months now. This is costing us loads of money (Due to Roaming fees) as we are stuck outside SA due to the Covid situation. The issue needs to be resolved and my wife should be credited the bank charges.