Consistent pathetic service

Truly pathetic service. After going more than the extra mile and still not having my issues resolved, I opened new business accounts at another bank with excellent service - Mercantile. Now to try and close the FNB business accounts... I phoned for the 5th time today, as always "we are experiencing high that normal call volumes and encourage you to use the banking app". 20 minute holding time is quite normal, so is being cut off during a call. So FNB, how do I get my business accounts closed? I sent an email to my business banker - which is still unanswered after several days. And the call center is too busy, cannot get through in reasonable time. May I suggest adding a "close the account" function to your banking app?