Bad Service FNB

I received a message from FNB asking me to provide source of income for an amount that got paid into my account for a private vehicle sold. I hold a private account at FNB. Nonetheless my account was put on hold....an account i transact on a daily basis on. I sent the agreement letter between the buyer and myself in the hope that my account would get unlocked. On my way home from work i tried calling the fnb call centre to confirm and enquire about why i still cant transact on my account. After several attempts and unhelpful agents i eventually got through to an agent who then proceeded to call me his friend in a sarcastic tone because i said i have the fnb app and he rep**** that he can see i do not have the app to which i said i have the banking app and he then said its not the online app he was asking me about. By this time i was already upset even further. He then asked me for my id number which i gave him only to be told he cannot help me if i do not have my card with me. Since i was driving my card was in my bag out of reach. It is 5 hours later since i provided my source of income and still my account is on hold!! I am extremely unhappy with the service and wish to close my account . With the risk of covid 19 am i still expected to go into the bank because fnb call centre and telephonic assistance is unreliable ??