FNB - worst banking experience in 40 years

As I said to FNB KYC department two days ago. This is my worst experience with a bank in 40 years . My account was blocked and I was asked to send proof of address an copy of ID for FICA requirement. On 15 January 2020 I received an email saying it was uploaded an all is in place. On 18 February 2020 my account was blocked when I want to use it . I was asked to send the same documents again. On 19 February 2020 I was told I need to supply the source of funds I had in my account in November 2019. I sent this and since then had NO response at all - not even on my emails asking if they have received the document and if it was what they were looking for . Trying to call them is a waste of time - holding on for 30 minutes listening to "we have higher call volumes then normal...……." There is simply no understanding of customer service.