Very disappointed at fnb !!!! Out of all banks , fnb has been my first priority

I have been using Fnb ever since I had a bank account in my life.

I received funds from bitcoin in September and in November my account t was frozen without being notified or emailed, they told me that the funds I received are of ***** and I did send them a proof of payment from the sender and they did not want to hear anything from me , 2 accounts I made transactions to are closed . My account is being closed too , and they said I will never open fnb account in my life anymore , how true is that ?