Hard Hold on Account

I am using the PayPal Services with FNB and all was going well. I linked and verified my bank account and was almost at the finish line, but when I chose the bank account that I wanted to receive the deposit into, FNB informed me I have a "Hard hold" on the account. This is fine, I just wanted to know what it was and how I could fix it. I phoned their phone lines which are constantly busy. I have emailed with no response. I have even tried to use the secure chat and they refuse to help. How am I supposed to sort out this issue then?